短語詞組短語coal lock -hopper 密封煤斗lock -hopper 鎖斗slag lock -hopper 密封渣斗lock bolt hopper 活底料斗lock hopper feed 密封艙加料法coal lock hopper 閉鎖式煤斗lock hopper valve 鎖斗閥;鎖渣閥ash lock hopper 閉鎖式煤渣斗lock hopper control 閉鎖料斗控制 返回 lock hopper