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由铁道部株洲电力机车工厂最新研制出的八轴重载贷运电力机车——SS4改进型电力机车,从1993年下半年开始己进入批量生产。1993年9月,我们编辑出版了《SS4改进型电力机车电气线路与空气管路》一书和附图册。为保证该书的正确性和延续性,本刊特辟专栏以及时刊载该车的改进动态。
From the Ministry of Railways Zhuzhou electric locomotive factory newly developed eight-axle heavy-duty credit transport electric locomotive - SS4 modified electric locomotive, from the second half of 1993 has entered mass production. In September 1993, we edited and published book and atlases of Electrical Circuits and Air Lines for SS4 Modified Electric Locomotives. In order to ensure the correctness and continuity of the book, this publication provides a special column to timely update the improvement of the car.