短語(yǔ)詞組

短語(yǔ)

• derrick head span block 吊桿頭跨繩滑車(chē)
• derrick head purchase block 上吊貨滑車(chē)
• derrick head cargo block 吊桿頭起貨滑車(chē);吊桿頭起重滑車(chē);上吊貨滑車(chē)
• derrick head shipment block 吊桿頭起貨滑車(chē)
• derrick k head cargo block 吊桿頭起貨滑車(chē)
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