短语词组短語telescopic top mast 伸縮頂桅telescopic c mast 拉杆天線telescopic drilling mast 伸縮式鑽井桅杆Telescopic Mast LT 陞縮柱式陞降台wireless telescopic mast 無線電台天線陞降裝置radio telescopic mast 無線電台天線陞降裝置 返回 telescopic mast