题目内容

SS型人货两用施工升降机使用的瞬时式防坠安全装置一般由断绳保护装置和停层防坠落装置两部分组成。()

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It is the responsibility of the crane operator to, at all times, be aware of the location

A. load
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D. All of the above

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A. Gain Control
Brilliant Control
C. Anti-clutter Sea Control
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顺绕的钢丝绳常用于起重机中。()

大雾天气和六级以上大风时应当停止焊接作业。()