Air boat

•Download as PPTX, PDF•

0 likes•158 views

R

Regalla Pravalika Reddy

Air Boat is also known as Electric Boat.The military heavily used the air boats in submarines.No Pollution.No Fuel

HISTORY OF AIR BOAT
An early electric boat was
developed by the German
inventor Mortiz von Jacobi in
1839 in St.Petersburg ,Russia.
 The current workforce is more
than 13,000 employees.
4

More Related Content

Viewers also liked

Armas de EE.UU

Project center in trichy, IEEE 2016-17 TITLES FOR JAVA AND DOTNET,final year projects for b.e/b.tech,m.e/m.tech,engineering students final year projects for b.e/b.tech,m.e/m.tech,best project center in trichy Jul 30, 3:08 AM We are offering PROJECTS in EMBEDDED, MATLAB, NS2, VLSI, Power Electronics,Power Systems for BE- ECE & EEE Students. Own Concepts also accepted.providing real time projects on MATLAB,EMB&VLSI for ECE Dept DreamwebTechnosolutions 73/5,3rd FLOOR,SRI KAMATCHI COMPLEX OPP.CITY HOSPITAL (NEAR LAKSHMI COMPLEX) SALAI ROAD,Trichy - 620 018, Ph: 0431 4050403,7200021403/04

Ieee power system projects with abstract in trichy

Ieee power system projects with abstract in trichy

Ieee power system projects with abstract in trichy

elakkiya.dreamweb dream

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

elakkiya.dreamweb dream

Ieee 2016 project titles in mobilecomputing for me m.tech

Ieee 2016 project titles in mobilecomputing for me m.tech

Ieee 2016 project titles in mobilecomputing for me m.tech

elakkiya.dreamweb dream

juan jose gomez garcia 6b

juan jose gomez garcia 6b

juan jose gomez garcia 6b

chechenko131204

The iCSS Chemistry Dashboard is a publicly accessible dashboard provided by the National Center for Computation Toxicology at the US-EPA. It serves a number of purposes, including providing a chemistry database underpinning many of our public-facing projects (e.g. ToxCast and ExpoCast). The available data and searches provide a valuable path to structure identification using mass spectrometry as the source data. With an underlying database of over 720,000 chemicals, the dashboard has already been used to assist in identifying chemicals present in house dust. However, it can also be applied to many other purposes, e.g., the identification of agrochemicals in waste streams. This presentation will provide a review of the EPA’s platform and underlying algorithms used for the purpose of compound identification using high-resolution mass spectrometry data. We will also discuss progress towards a high-throughput non-targeted analysis platform for use by the mass spectrometry community. This abstract does not reflect U.S. EPA policy.

Structure identification using high resolution mass spectrometry data and the...

Structure identification using high resolution mass spectrometry data and the...

Structure identification using high resolution mass spectrometry data and the...

Andrew McEachran

GFCBrochure2015

GFCBrochure2015

GFCBrochure2015

Sara Gunderson Hawkins

Ieee 2016 project titles for me computer science

Ieee 2016 project titles for me computer science

Ieee 2016 project titles for me computer science

elakkiya.dreamweb dream

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

elakkiya.dreamweb dream

Viewers also liked (9)

Armas de EE.UU

Ieee power system projects with abstract in trichy

Ieee power system projects with abstract in trichy

Ieee power system projects with abstract in trichy

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 project titles in mobilecomputing for me m.tech

Ieee 2016 project titles in mobilecomputing for me m.tech

Ieee 2016 project titles in mobilecomputing for me m.tech

juan jose gomez garcia 6b

juan jose gomez garcia 6b

juan jose gomez garcia 6b

Structure identification using high resolution mass spectrometry data and the...

Structure identification using high resolution mass spectrometry data and the...

Structure identification using high resolution mass spectrometry data and the...

GFCBrochure2015

GFCBrochure2015

GFCBrochure2015

Ieee 2016 project titles for me computer science

Ieee 2016 project titles for me computer science

Ieee 2016 project titles for me computer science

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

Ieee 2016 2017 titles in network security for java and dotnet

Recently uploaded

Call Girls In Mahipalpur (Delhi) Call or Whataap {+91-8377877756} Escorts Provide 24×7 Available With Room ☆☆TIMINGS 24 HOURS OPENS☆☆☆ Booking Now Gentleman Only:-Call Now Best High Class Normal Call Girls Escorts Service In Delhi NCR 24-7 Hours Available Service I provide In Delhi NCR Female Escorts Sex Service 100% Customers Satisfaction Guarantee VIP Profiles Top Grade Service 100% Cooperative All round Service ꧁❤8377877756❤꧂ InCall: – You Can Reach At Our Place in Delhi Our place Which Is Very Clean Hygienic 100% safe Accommodation OutCall: – Service For Out Call You Have To Come Pick The Girl From My Place. We Also Provide Door Step Services. Note: – Pic Collectors Time Passers And Bargainers Stay Away As We Respect The Value Of Your Money And Time And Expect The Same From You. 8377877756. Hygienic: – Full Ac Neat And Clean Rooms Available In Hotel 24 * 7 Hrs In Delhi NCR 8377877756. Place: – South Extension Nehru Place Saket Malviya Nagar Munirka Vasant Kunj Safdarjung Katwaria Sarai Lajpat Nagar Kalkaji Hauz Khas Mahipalpur Dwarka Karol Bagh Noida Gurgaon Faridabad All Outcall Only Hotel Service In Delhi Ncr 8377877756. We are providing. : – House Wife’s : – Private Independent House Wife’s : – Private Independent Collage Going Girls : – Corporate MNC Working Profiles : – Call Center Girls : – Live Band Girls : – Foreigners and Many More: – Independent Models Service type : – Incall Short 2500 : – Outcall Short 3500 : – Incall Night 8500 : – Outcall Night 95,00 For Pictures And Other Details Pls Whatsapp Me Otherwise Call Me Any Time Incall Outcall Both Are Services Available Door Step, House, Apartment, Guest House, Flate, All Star Hotel Available ꧁❤8377877756❤꧂ THANKS FOR VISITING. Booking 24×7 HRS

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756

dollysharma2066

Call Girl Meerut Indira Call Now: 8617697112 Meerut Escorts Booking Contact Details WhatsApp Chat: +91-8617697112 Meerut Escort Service includes providing maximum physical satisfaction to their clients as well as engaging conversation that keeps your time enjoyable and entertaining. Plus they look fabulously elegant; making an impressionable. Independent Escorts Meerut understands the value of confidentiality and discretion - they will go the extra mile to meet your needs. Simply contact them via text messaging or through their online profiles; they'd be more than delighted to accommodate any request or arrange a romantic date or fun-filled night together. We provide –

(INDIRA) Call Girl Meerut Call Now 8617697112 Meerut Escorts 24x7

(INDIRA) Call Girl Meerut Call Now 8617697112 Meerut Escorts 24x7

(INDIRA) Call Girl Meerut Call Now 8617697112 Meerut Escorts 24x7

Call Girls in Nagpur High Profile Call Girls

STEAM NOZZLES AND TURBINES Flow of steam through nozzles, shapes of nozzles, effect of friction, critical pressure ratio, supersaturated flow - impulse and reaction principles, velocity diagram, work done and efficiency – types of compounding - governors. AIR COMPRESSORS Classification - working principle - type of compressors, work of compression with and without clearance - volumetric efficiency - isothermal and isentropic efficiency of reciprocating compressors - multistage air compressor with inter cooling.

Thermal Engineering -unit - III & IV.ppt

Thermal Engineering -unit - III & IV.ppt

Thermal Engineering -unit - III & IV.ppt

DineshKumar4165

GAS POWER CYCLES Cycles: Otto, Diesel, Dual, Brayton - Calculation of mean effective pressure - Air standard efficiency - Comparison of cycles INTERNAL COMBUSTION ENGINES Classification - Components and their function - valve timing diagram and port timing diagram - actual and theoretical p-v diagram of two stroke and four stroke engines – carburettor - diesel pump and injector system - battery and magneto ignition system - principles of combustion and detonation in CI engines - lubrication and cooling systems - performance parameters and calculations.

Thermal Engineering Unit - I & II . ppt

Thermal Engineering Unit - I & II . ppt

Thermal Engineering Unit - I & II . ppt

DineshKumar4165

Model Call Girl Services in Delhi reach out to us at 🔝 9953056974 🔝✔️✔️ Our agency presents a selection of young, charming call girls available for bookings at Oyo Hotels. Experience high-class escort services at pocket-friendly rates, with our female escorts exuding both beauty and a delightful personality, ready to meet your desires. Whether it's Housewives, College girls, Russian girls, Muslim girls, or any other preference, we offer a diverse range of options to cater to your tastes. We provide both in-call and out-call services for your convenience. Our in-call location in Delhi ensures cleanliness, hygiene, and 100% safety, while our out-call services offer doorstep delivery for added ease. We value your time and money, hence we kindly request pic collectors, time-passers, and bargain hunters to refrain from contacting us. Our services feature various packages at competitive rates: One shot: ₹2000/in-call, ₹5000/out-call Two shots with one girl: ₹3500/in-call, ₹6000/out-call Body to body massage with sex: ₹3000/in-call Full night for one person: ₹7000/in-call, ₹10000/out-call Full night for more than 1 person: Contact us at 🔝 9953056974 🔝. for details Operating 24/7, we serve various locations in Delhi, including Green Park, Lajpat Nagar, Saket, and Hauz Khas near metro stations. For premium call girl services in Delhi 🔝 9953056974 🔝. Thank you for considering us!

Call Now ≽ 9953056974 ≼🔝 Call Girls In New Ashok Nagar ≼🔝 Delhi door step de...

Call Now ≽ 9953056974 ≼🔝 Call Girls In New Ashok Nagar ≼🔝 Delhi door step de...

Call Now ≽ 9953056974 ≼🔝 Call Girls In New Ashok Nagar ≼🔝 Delhi door step de...

9953056974 Low Rate Call Girls In Saket, Delhi NCR

Java Programming :Event Handling(Types of Events)

Java Programming :Event Handling(Types of Events)

Java Programming :Event Handling(Types of Events)

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Chance Of Getting Into My Sexy Boobs? Booking Contact Details WhatsApp Chat: +91-8250192130 pune Escort Service includes providing maximum physical satisfaction to their clients as well as engaging conversation that keeps your time enjoyable and entertaining. Plus they look fabulously elegant; making an impressionable. Independent Escorts pune understands the value of confidentiality and discretion - they will go the extra mile to meet your needs. Simply contact them via text messaging or through their online profiles; they'd be more than delighted to accommodate any request or arrange a romantic date or fun-filled night together. We provide - 30-april-2024(v.n)

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Cha...

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Cha...

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Cha...

KubeKraft presentation @CloudNativeHooghly

KubeKraft presentation @CloudNativeHooghly

KubeKraft presentation @CloudNativeHooghly

sanyuktamishra911

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking Booking Now open +91- 7737669865 Why you Choose Us- +91- 7737669865 HOT⇄ 7737669865 Mr ashu ji Call Mr ashu Ji +91- 7737669865 (V020524]N) 𝐇𝐨𝐭𝐞𝐥 𝐑𝐨𝐨𝐦𝐬 𝐈𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐑𝐚𝐭𝐞 𝐒𝐡𝐨𝐭𝐬/𝐇𝐨𝐮𝐫𝐲🆓 .█▬█⓿▀█▀ 𝐈𝐍𝐃𝐄𝐏𝐄𝐍𝐃𝐄𝐍𝐓 𝐆𝐈𝐑𝐋 𝐕𝐈𝐏 𝐄𝐒𝐂𝐎𝐑𝐓 Hello Guys ! High Profiles young Beauties and Good Looking standard Profiles Available , Enquire Now if you are interested in Hifi Service and want to get connect with someone who can understand your needs. Service offers you the most beautiful High Profile sexy independent female Escorts in genuine ✔✔✔ To enjoy with hot and sexy girls ✔✔✔ ★providing:- • Models • vip Models • Russian Models

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking

NFPA 5000 2024 standard .

NFPA 5000 2024 standard .

NFPA 5000 2024 standard .

DerechoLaboralIndivi

Generative AI or GenAI technology based PPT

Generative AI or GenAI technology based PPT

Generative AI or GenAI technology based PPT

PVC VS. FIBERGLASS (FRP) GRAVITY SEWER - UNI BELL

PVC VS. FIBERGLASS (FRP) GRAVITY SEWER - UNI BELL

PVC VS. FIBERGLASS (FRP) GRAVITY SEWER - UNI BELL

ManishPatel169454

Unleashing the Power of the SORA AI lastest leap

Unleashing the Power of the SORA AI lastest leap

Unleashing the Power of the SORA AI lastest leap

RishantSharmaFr

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Girls Waiting For You To Fuck Booking Contact Details WhatsApp Chat: +91-6297143586 pune Escort Service includes providing maximum physical satisfaction to their clients as well as engaging conversation that keeps your time enjoyable and entertaining. Plus they look fabulously elegant; making an impressionable. Independent Escorts pune understands the value of confidentiality and discretion - they will go the extra mile to meet your needs. Simply contact them via text messaging or through their online profiles; they'd be more than delighted to accommodate any request or arrange a romantic date or fun-filled night together. We provide - 01-may-2024(v.n)

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Gi...

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Gi...

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Gi...

Call Girls in Nagpur High Profile

Data security is rapidly gaining importance as the volume of data companies collect, analyze and monetize grows exponentially. New data processing tools and platforms are emerging at an increasing rate, as are the ways in which an organization consumes data. In this presentation Mukund Sarma and Feni Chawla talk about the unique technical and cultural challenges of running a data security program and share some practical solutions that have worked well at our company. These slides were presented at the BSides Seattle 2024 conference.

BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx

BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx

BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Indian Girls Waiting For You To Fuck Booking Contact Details WhatsApp Chat: +91-6297143586 pune Escort Service includes providing maximum physical satisfaction to their clients as well as engaging conversation that keeps your time enjoyable and entertaining. Plus they look fabulously elegant; making an impressionable. Independent Escorts pune understands the value of confidentiality and discretion - they will go the extra mile to meet your needs. Simply contact them via text messaging or through their online profiles; they'd be more than delighted to accommodate any request or arrange a romantic date or fun-filled night together. We provide - 01-may-2024(v.n)

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Ind...

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Ind...

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Ind...

Call Girls in Nagpur High Profile

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to 25K High Profile Escorts In Pune Booking Now open +91- 8005736733 Why you Choose Us- +91- 8005736733 HOT⇄ 8005736733 Mr ashu ji Call Mr ashu Ji +91- 8005736733 (V030524]N) 𝐇𝐨𝐭𝐞𝐥 𝐑𝐨𝐨𝐦𝐬 𝐈𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐑𝐚𝐭𝐞 𝐒𝐡𝐨𝐭𝐬/𝐇𝐨𝐮𝐫𝐲🆓 .█▬█⓿▀█▀ 𝐈𝐍𝐃𝐄𝐏𝐄𝐍𝐃𝐄𝐍𝐓 𝐆𝐈𝐑𝐋 𝐕𝐈𝐏 𝐄𝐒𝐂𝐎𝐑𝐓 Hello Guys ! High Profiles young Beauties and Good Looking standard Profiles Available , Enquire Now if you are interested in Hifi Service and want to get connect with someone who can understand your needs. Service offers you the most beautiful High Profile sexy independent female Escorts in genuine ✔✔✔ To enjoy with hot and sexy girls ✔✔✔ ★providing:- • Models • vip Models • Russian Models • Foreigner Models • TV Actress and Celebrities • Receptionist • Air Hostess • Call Center Working Girls/Women • Hi-Tech Co. Girls/Women • Housewife

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to ...

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to ...

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to ...

Unit 1 - Soil Classification and Compaction.pdf

Unit 1 - Soil Classification and Compaction.pdf

Unit 1 - Soil Classification and Compaction.pdf

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking Booking Now open +91- 7737669865 Why you Choose Us- +91- 7737669865 HOT⇄ 7737669865 Mr ashu ji Call Mr ashu Ji +91- 7737669865 (V020524]N) 𝐇𝐨𝐭𝐞𝐥 𝐑𝐨𝐨𝐦𝐬 𝐈𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐑𝐚𝐭𝐞 𝐒𝐡𝐨𝐭𝐬/𝐇𝐨𝐮𝐫𝐲🆓 .█▬█⓿▀█▀ 𝐈𝐍𝐃𝐄𝐏𝐄𝐍𝐃𝐄𝐍𝐓 𝐆𝐈𝐑𝐋 𝐕𝐈𝐏 𝐄𝐒𝐂𝐎𝐑𝐓 Hello Guys ! High Profiles young Beauties and Good Looking standard Profiles Available , Enquire Now if you are interested in Hifi Service and want to get connect with someone who can understand your needs. Service offers you the most beautiful High Profile sexy independent female Escorts in genuine ✔✔✔ To enjoy with hot and sexy girls ✔✔✔ ★providing:- • Models • vip Models • Russian Models

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking

Thermal Engineering-R & A / C - unit - V

Thermal Engineering-R & A / C - unit - V

Thermal Engineering-R & A / C - unit - V

DineshKumar4165

Recently uploaded (20)

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756

(INDIRA) Call Girl Meerut Call Now 8617697112 Meerut Escorts 24x7

(INDIRA) Call Girl Meerut Call Now 8617697112 Meerut Escorts 24x7

(INDIRA) Call Girl Meerut Call Now 8617697112 Meerut Escorts 24x7

Thermal Engineering -unit - III & IV.ppt

Thermal Engineering -unit - III & IV.ppt

Thermal Engineering -unit - III & IV.ppt

Thermal Engineering Unit - I & II . ppt

Thermal Engineering Unit - I & II . ppt

Thermal Engineering Unit - I & II . ppt

Call Now ≽ 9953056974 ≼🔝 Call Girls In New Ashok Nagar ≼🔝 Delhi door step de...

Call Now ≽ 9953056974 ≼🔝 Call Girls In New Ashok Nagar ≼🔝 Delhi door step de...

Call Now ≽ 9953056974 ≼🔝 Call Girls In New Ashok Nagar ≼🔝 Delhi door step de...

Java Programming :Event Handling(Types of Events)

Java Programming :Event Handling(Types of Events)

Java Programming :Event Handling(Types of Events)

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Cha...

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Cha...

The Most Attractive Pune Call Girls Manchar 8250192130 Will You Miss This Cha...

KubeKraft presentation @CloudNativeHooghly

KubeKraft presentation @CloudNativeHooghly

KubeKraft presentation @CloudNativeHooghly

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Wakad Call Me 7737669865 Budget Friendly No Advance Booking

NFPA 5000 2024 standard .

NFPA 5000 2024 standard .

NFPA 5000 2024 standard .

Generative AI or GenAI technology based PPT

Generative AI or GenAI technology based PPT

Generative AI or GenAI technology based PPT

PVC VS. FIBERGLASS (FRP) GRAVITY SEWER - UNI BELL

PVC VS. FIBERGLASS (FRP) GRAVITY SEWER - UNI BELL

PVC VS. FIBERGLASS (FRP) GRAVITY SEWER - UNI BELL

Unleashing the Power of the SORA AI lastest leap

Unleashing the Power of the SORA AI lastest leap

Unleashing the Power of the SORA AI lastest leap

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Gi...

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Gi...

Booking open Available Pune Call Girls Pargaon 6297143586 Call Hot Indian Gi...

BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx

BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx

BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Ind...

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Ind...

Booking open Available Pune Call Girls Koregaon Park 6297143586 Call Hot Ind...

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to ...

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to ...

VIP Model Call Girls Kothrud ( Pune ) Call ON 8005736733 Starting From 5K to ...

Unit 1 - Soil Classification and Compaction.pdf

Unit 1 - Soil Classification and Compaction.pdf

Unit 1 - Soil Classification and Compaction.pdf

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking

Call Girls Walvekar Nagar Call Me 7737669865 Budget Friendly No Advance Booking

Thermal Engineering-R & A / C - unit - V

Thermal Engineering-R & A / C - unit - V

Thermal Engineering-R & A / C - unit - V

Air boat

4. HISTORY OF AIR BOAT An early electric boat was developed by the German inventor Mortiz von Jacobi in 1839 in St.Petersburg ,Russia.  The current workforce is more than 13,000 employees. 4