短語詞組短語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 cargo lead block 吊貨索導(dǎo)曏滑車derrick head cargo block 吊桿頭起貨滑車;吊桿頭起重滑車;上吊貨滑車derrick head shipment block 吊桿頭起貨滑車cargo derrick heel lead block 吊貨桿座導(dǎo)索滑車 返回 derrick block