crown block中文，crown block的意思，crown block翻译及用法

2026-01-09 20:38 浏览次数 20

crown block

英[kraun blɔk]美[kraʊn blɑk]

定滑轮

crown block 英语释义

英语释义

    1. a timber or steel pulley support connecting at the top the derrick posts of an oil well

crown block 片语

片语

bailer r crown-block捞砂天车

arch crown block拱顶石

sliding crown-block可平移的天车

run into crown-block碰天车

crown n block天车

straight rotary crown-block单层天车

bailer crown-block捞砂天车

valve-against-overwinding crown-block protector天车卷闸防碰安装

g crown-block可平移的天车

crown block 例句

英汉例句

  • the drilling line is reeled over the crown block and traveling block to gain mechanical advantage in a 「block and tackle」 or 「pulley」 fashion.

    鉆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。

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