基本解釋[經(jīng)濟(jì)學(xué)]提升滑輪英漢例句雙語(yǔ)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(chē)上，當(dāng)蛇皮接繩器到達(dá)天車(chē)時(shí)，通知司鉆。blog.sina.com.cnderrick block更多例句詞組短語(yǔ)短語(yǔ)derrick head block 吊桿頭滑車(chē)derrick heel block 吊桿底導(dǎo)向滑車(chē);吊桿座滑車(chē)derrick k block 提升滑輪derrick head span block 吊桿頭跨繩滑車(chē)derrick head purchase block 上吊貨滑車(chē)derrick block更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)提升滑輪