短語詞組短語backing up roll 支承輥bottom backing up roll 下支持輥;下支承輥top backing up roll 上支承輥backing roll mark 背輥痕forged steel backing roll 鍛鋼支承輥cutter backing roll 切紙機(jī)支撐輥backing -up roll [機(jī)]支撐軋輥;托模輥cast steel backing roll 鑄鋼支承輥 返回 backing roll