放松起重机吊索，使泵回到排泄弯管。

On returning pump to discharge elbow, lower hoist cable until it is slack.

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起重机、吊索和吊机上应清楚标示载重容限。

Capacity limits should be clearly marked on cranes, slings, and hoists.

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规定要对起重机、吊机、吊索进行安全检查。

Inspections should be conducted on cranes, hoists, and slings.

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