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２００２年６月上旬，首台独立通风SS９改进型电力机车在株洲电力机车厂落成。SS９型电力机车设计改进是在原SS９型电力机车主要技术参数和牵引制动特性不变的基础上，开发一种新型的机车设备布置设计平台。其中设计的主要更改为采用独立通风系统和中央走廊设备布置方式。机车?
In early June 2002, the first independently ventilated SS9 electric locomotive was completed at Zhuzhou Electric Locomotive Works. SS9 electric locomotive design improvement is based on the original SS9 electric locomotive main technical parameters and traction braking characteristics unchanged, the development of a new locomotive equipment layout design platform. The main design changes were the use of independent ventilation systems and the arrangement of central corridors. locomotive?