指导：动力辅助齿轮齿条式。
本文对拖拉机动力输出齿轮箱的计算机辅助设计作了一系列研究。
This text made a series of research to Computer Aided Design of Gear box of the tractor power output.
西门子负责的部分包括：列车控制及诊断系统、牵引逆变器、辅助逆变器、制动电阻、高压箱及受电弓，以及牵引电动机和齿轮箱。
Siemens' scope of supply includes: train control and diagnosis system, traction inverter, auxiliary inverter, brake resistor, HV box and Pantograph, as well as traction motor and gear box.
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