采用电缆拖车或安全滑触线受电。
该装置不受电缆张力大小的限制，结构简单，控制可靠，可获得满意的同步性，并可推广应用。
This device is free of the limit to the strain amount of the cable, with simple structure, reliable control and satisfactory synchronism. It will find wide application.
该装置不受电缆张力大小的限制，结构简单，控制可靠，可获得满意的同步性，并可推广应用。
This device is free of the limit to the strain amount of the cable, with simple structure, reliable control and satisfactory synchronism. It will find wide application.
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