Unit 1 Locomotives Text 1 Types of Locomotives Text 2 Introduction ofElectric Locomotives 參考譯文 Unit 2 Braking Text 1 Foundation Braking Gear Text 2 Working Principle of Foundation Braking Gear 參考譯文 Unit 3 Equipment Layout and Ventilation System Text 1 General Description Text 2 Equipment Layout Text 3 Ventilation System 參考譯文 Unit 4 Car Body Text 1 Structure of the Car Body Text 2 Underframe of SS4G 參考譯文 Unit 5 Power Electronic Systems Text 1 The Development of Power Electronic Systems Text 2 Power Electronic Conveters 參考譯文 Unit 6 Pneumatic System Text 1 Air Resource System Text 2 Control Pipe System Text 3 Auxiliary Pipe System 參考譯文 Unit 7 Pantographs Text 1 General Description Text 2 Structure of Type TSG3—630/25 參考譯文 Unit 8 Main Circuit Breaker Text 1 Introduction of the Main Circuit Breaker Text 2 The Circuit Breaker TDZlA-10/25 Text 3 The TDZ 1 A1 0/25 Operation Principle 參考譯文 Unit 9 Bogie TeXt 1 General Introduction Text 2 Bogie Configurations 參考譯文 References