短語詞組短語pig signaller 清管器通過標(biāo)牌SHEARING SIGNALLER 剪斷銷信號裝置scraper signaller 清管器信號裝置signaller r 信號工single signaller 單動信號機(jī)entering station signaller 進(jìn)站信號機(jī)Rigger and signaller 吊索 返回 signaller