derrick man

基本解释

The driller and the derrick man must remain in constant radio contact.
司钻和井架工必须用对讲机一直保持联系。
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The derrick man, positioned at the crown block, is to advise the driller when the snake is coming through the crown sheave.
井架工看守在天车上，当蛇皮接绳器到达天车时，通知司钻。
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The air hoist may be used to hoist a workman (other than derrick-man) when a bosom chair with safety belt or derrick climbing belt is used to hoist the workman.
可以使用配了安全带或助爬带的工作吊椅进行高空作业。