短語詞組短語scraper conveyer chain 刮板輸送機chain scraper bar conveyer 拉鏈刮板輸送機chain -scraper conveyer 鏈板運輸機chain and scraper conveyer 鏈式鏟運機water -sealed chain scraper bar conveyer 水封拉鏈機chain n scraper bar conveyer 拉鏈刮板輸送機 返回 scraper chain conveyer