短語詞組短語telescopic top mast 伸縮頂桅telescopic c mast 拉桿天線telescopic drilling mast 伸縮式鉆井桅桿Telescopic Mast LT 升縮柱式升降臺wireless telescopic mast 無線電臺天線升降裝置radio telescopic mast 無線電臺天線升降裝置 返回 telescopic mast