Fundamentals of fluid power
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Fluid power systems use either compressed gas or liquid to transmit power through pressure. Pressure is measured using a pressure gauge and is calculated as force over unit area. Power in a fluid system equals pressure times flow rate and can be used to calculate the efficiency of components like cylinders, motors, and pumps which have measurable input and output power. Hydraulic systems use mostly incompressible liquids while pneumatic systems use compressible gases, and the compressibility of fluids affects the relationship between pressure, temperature, and density during expansion and compression. Accumulators can store pressurized fluids to manage pressure changes.
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
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8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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