Do not use tractors to replace the rig power system for mast lifting and laying down.
不应使用牵引车代替钻机动力系统进行起放井架作业。
The mechanism drive system of the roller power rig for six-axle rail vehicle can simulate the lines of test vehicle.
六轴机车滚动功率试验台机械传动系统能模拟被试对象运行的线路。
The paper presents the research results of the PWM rectifier system used for the reciprocal power-fed test rig.
介绍了用于交流传动互馈试验平台的PWM整流器系统主电路的设计及参数选择。
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