n.a framework erected over an oil well to allow drill tubes to be raised and lowereda simple crane having lifting tackle slung from a boom
derrick 相关例句
词组短语
oil derrick井架;油井架;钻油塔
双语例句
用作名词(n.)
The ginpole is the simplest form of derrick. 起重吊杆是一种最简单的起重机。
They were placed by a derrick mounted on rails on the bridge deck. 它们由轨道上的转臂吊机吊放在桥面上。
We put up at the surface an oil derrick. 我们就在那块地面上竖起一个井架。
The derrick has been skidded to the towing position. 井架已经移到适合托航位置。
权威例句
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