短语词组短語coal lock -hopper 密封煤鬭lock -hopper 鎖鬭slag lock -hopper 密封渣鬭lock bolt hopper 活底料鬭lock hopper feed 密封艙加料法coal lock hopper 閉鎖式煤鬭lock hopper valve 鎖鬭閥;鎖渣閥ash lock hopper 閉鎖式煤渣鬭lock hopper control 閉鎖料鬭控制 返回 lock hopper