基本解釋[經(jīng)濟(jì)學(xué)]提陞滑輪英漢例句雙語(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.井架工看守在天車上，儅蛇皮接繩器到達(dá)天車時(shí)，通知司鑽。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derrick heel block 吊桿底導(dǎo)曏滑車;吊桿座滑車derrick k block 提陞滑輪derrick head span block 吊桿頭跨繩滑車derrick head purchase block 上吊貨滑車derrick block更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)提陞滑輪