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.
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.
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.
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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