    (Transformer)
(Coil)         2             4
   1.    (Primary)                        (Secondary)         (step-down)                 secondary    primary           ...
    .                                   secondary                     (Power)           primary    primary    secondary ...
นำเสนอไฟฟ้า
นำเสนอไฟฟ้า
นำเสนอไฟฟ้า
นำเสนอไฟฟ้า
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นำเสนอไฟฟ้า

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นำเสนอไฟฟ้า

  1. 1.  (Transformer)
  2. 2. (Coil) 2 4
  3. 3.  1. (Primary) (Secondary) (step-down) secondary primary (Step-up)
  4. 4.  . secondary (Power) primary primary secondary Primary =

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