英语词汇crown block怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	crown block
释义	crown block 简明释义顶轮支架：连接在油井井架柱顶部的木材或钢制滑轮支架。网络释义 1 [机]?天车 ... 绞车电机DC moter, drawworks 天车crown block 卧式供油罐supplying oil tank ... 2 ?起重定滑轮 ... crowbar铁撬棍撬杆 crown block起重定滑轮 crown circle外端齿顶圆 ... 3 ?拱顶石 ... cover block 盖面块（混凝土的),垫块,填块 crown block 拱顶石;起重机顶部滑车组 cushion block 垫块 ... 短语 1 bailer crown-block 捞砂天车 2 sliding crown-block 可平移的天车 3 arch crown block 拱顶石双语例句 1 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。 2 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。 3 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。
随便看	intermediate text language intermediate theory intermediate thermal medium tank intermediate thickness free skin graft intermediate thickness skin graft intermediate thrust bearing intermediate tide intermediate tie intermediate tier intermediate time scale storage intermediate tissue intermediate toll center intermediate tone intermediate total intermediate trade intermediate train Intermediate transfer of pedicle flap intermediate transfer point intermediate transformer intermediate transit point intermediate transmission intermediate transmission block intermediate transport intermediate transportation entry intermediate transport system

英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。