rail screw-bolt power wrench的意思|示意

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导轨螺丝螺栓动力扳手

机动螺钉 ... 钢轨推凸器 rail shearing device 机动螺钉；螺栓板手 rail screw-bolt power wrench 地面钢轨凃油器 on-track rail lubricator ...

螺栓搬手 ... strengthening screw bolt 强力螺栓 tap bolt, tap screw 螺基 rail screw-bolt power wrench 螺栓搬手 ...

螺栓板手 ... 钢轨推凸器 rail shearing device 机动螺钉；螺栓板手 rail screw-bolt power wrench 地面钢轨凃油器 on-track rail lubricator ...