crown block
天车
常用释义
英式发音
美式发音
基本释义
- 顶轮支架：连接在油井井架柱顶部的木材或钢制滑轮支架。
例句
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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。
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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。
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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。
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4·In Chicago's Millennium Park, the Crown Fountain displays images of locals on a glass block tower.芝加哥城市生活图片。在芝加哥的千禧年公园，王冠喷泉显示图像当地人在一块玻璃塔上。
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5·Conclusions Applying 30% supersaturated potassium oxalate to block dentinal tubule could prevent or reduce crown surface discoloration effectively after front teeth canal therapy.结论使用30%草酸钾封闭牙本质小管可有效防止及减少前牙根管治疗后牙冠变色。
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6·From the crown sheave, manually pull and reeve the 1 inch Manila rope through the first sheave of the traveling block.用人力把棕绳从天车轮上拉过来，再穿过第一个游车轮。