短語詞組短語scraper r chain conveyor 鏈板輸送機chain scraper conveyor 鏈板輸送機armored chain -scraper conveyor [礦業(yè)][機]鎧裝鏈板輸送機armoured chain -scraper conveyor 鎧裝鏈板輸送機 返回 scraper chain conveyor