noddingdonkey网页 图片 视频 学术 词典 航班 nodding donkey 美 英 网络点头驴子;点头的驴子 英英 网络释义 n. 1. a reciprocating pump for extracting oil 隐私声明 法律声明 广告 反馈 © 2024 Microsoft
【石油磕头机 (nodding donkey)的工作原理】视频中机械装置大家肯定在现场或者视频书籍中看到过。很多人一直不知道这是干什么用的。其实这是开采石油的一种机械设备,是油田广泛应用的传统抽油设备,用来带动地下深井泵,将原油由地下输送到地上。磕头机由驴头、游梁、支架以及曲柄组成。其动力通常由交流异步电机带动,电机...
Twitter Google Share on Facebook nodding donkey Wikipedia n (Mining & Quarrying)informal(in the oil industry) a type of reciprocating pump used to extract oil from an inland well [C20: so called from its shape and movement] Collins English Dictionary – Complete and Unabridged, 12th Edition ...
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The Story of a Nodding Donkey豆瓣评分:0.0 简介:Laura Lee Hope was a pseudonym used by the Stratemeyer Syndicate. The Stratemeyer Syndicate was the producer of a number of series for children and adults at the beginning of the twentieth-century, in
Medical Idioms Encyclopedia Wikipedia Related to nodding:nodding off nod (nŏd) v.nod·ded,nod·ding,nods v.intr. 1.To lower and raise the head quickly, as in agreement or acknowledgment. 2.To let the head fall forward when sleepy. ...
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The Nodding Donkey dated his birth from the day he received the beautiful coat of varnish in the workshop of Santa Claus at the North Pole. Before that he was just some pieces of wood, glued together. His head was not glued on, however, but was fastened in such a manner that with th...
Cottingham, Chris