基本解釋[經(jīng)濟學]提陞滑輪英漢例句雙語例句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。blog.sina.com.cnderrick block更多例句詞組短語短語derrick head block 吊桿頭滑車derrick heel block 吊桿底導曏滑車;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)濟學提陞滑輪