derrick block
基本解釋
- [經(jīng)濟(jì)學(xué)]提升滑輪
英漢例句
- 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，當(dāng)蛇皮接繩器到達(dá)天車時(shí)，通知司鉆。
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雙語(yǔ)例句
詞組短語(yǔ)
- derrick head block 吊桿頭滑車
- derrick heel block 吊桿底導(dǎo)向滑車;吊桿座滑車
- derrick k block 提升滑輪
- derrick head span block 吊桿頭跨繩滑車
- derrick head purchase block 上吊貨滑車
短語(yǔ)
專業(yè)釋義
- 提升滑輪