短語詞組短語coal wheel -feeder 葉輪給煤機coal -feeder speed 給粉機轉(zhuǎn)速coal single -direction feeder 單曏給煤機coal double -direction feeder 雙曏給煤機buried scraper coal -feeder 埋置刮板給煤機coal portal -frame impeller feeder 門式葉輪給煤機the concentric multi -ring coal feeder 環(huán)式給煤機 返回 coal feeder