crown block
基本解释
- 定滑轮
英汉例句
- To replace the drilling line wrapped around the crown block and traveling block.
为更换缠绕在天车和游动滑车周围的钻井钢丝绳用。
www.infopetro.com.cn - The drilling line is reeled over the crown block and traveling block to gain mechanical advantage in a "block and tackle" or "pulley" fashion.
钻井用钢丝绳通过天车和游动滑车以滑轮组的形式获得机械上效益。
www.infopetro.com.cn - The text detailedly introduced crown block, running system, availability work period of bridge girder erection equipment and improve case for precast beams install.
详细介绍了对双导梁式架桥机天车、行走系统、有效工作长度及预制梁安装就位的改进情况。 - Strongly influenced behind the scenes by the Crown family of Chicago, which owned a controlling block of shares, the company sold off most of its military businesses when the Cold War ended in the biggest fire sale the defense sector had ever seen.
FORBES: General Dynamics Begins 2013 With New Leader, Changing Business Mix
双语例句
权威例句
词组短语
- bailer crown -block 捞砂天车
- sliding crown -block 可平移的天车
- crown n block 天车
- g crown -block 可平移的天车
- straight rotary crown -block 单层天车
短语
专业释义
- 天车
- 天车
- 定滑轮