关于复线式的升降机，要用大绳去牵引钢丝绳，绳头绑缚一定要安全可靠。

Lift on double type, to use the rope to traction wire rope, the rope tied to the safe and reliable.

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装于帆桁中央两侧的索具：能滑动的绳圈或链子，用来把帆桁或缆索拴在船桅上，使之仍可以随意升降。

A sliding loop of rope or chain by which a running yard or gaff is connected to, while still being able to move vertically along, the mast.

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作业人员进入液压升降机后应关闭护栏门，插上插销，系上安全绳，载荷的中心应尽量处于工作台面的中心位置。

Close the door guardrail workers into the elevator guide rail, plug, attached to a safety rope, the load center should as far as possible in the center position of the working table.

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