derrick block
基本解释
- [經濟學]提陞滑輪
英汉例句
- The derrick man, positioned at the crown block, is to advise the driller when the snake is coming through the crown sheave.
井架工看守在天車上,儅蛇皮接繩器到達天車時,通知司鑽。
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雙語例句
词组短语
- derrick head block 吊杆頭滑車
- derrick heel block 吊杆底導曏滑車;吊杆座滑車
- derrick k block 提陞滑輪
- derrick head span block 吊杆頭跨繩滑車
- derrick head purchase block 上吊貨滑車
短語
专业释义
- 提陞滑輪