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Unit 1 Stepping into the Colorful Metro World
Unit 2 Basic Equipment
Unit 3 Power Supply System
Unit 4 Signaling System
Unit 5 Telecommunication
Unit 6 Vehicles and Locomotives
Unit 7 Metro Security
Unit 8 Urban Rail Transit Operation

Unit 3 Power Supply System

Unit 3 Power Supply System
Listening Task1-Task 2
Listening Task 3
Listening Task 4
Intensive Reading
Extensive Reading