针对直流电力牵引区段车辆段轨道电路中的信号电流存在的迂回问题，提出了在工程设计中的防范措施。
For the problem of signal current bypass with track circuit of rolling stock depot in DC electric traction sections, the paper provides measures to prevent it.
介绍采煤机牵引部直流电力回馈加载试验台的组成、工作原理及特点，加载方法和控制，测试数据的采集、输出及显示。
Introduced a new implementing method for loading cutting part with high power of shearer, and expound working theory of loading test, main components and main technical feature.
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