closed die封闭模,闭合模,模锻模,闭式冲模closedadj.关闭的；封闭的；停业的动词close的过去式和过去分词.closed waterproof layer防水封闭层closed the door againstv.堵死 ... 的门路(拒 ... 于门外)Closed differential CVT封闭差动无级变速器Closed frequent subtree闭合频繁子树Closed fracture of foot足闭合性骨折closed suction drainage闭式吸引引流closed-loop transport闭环传动closed-loop stability闭环稳定性closed circuit grinding圈闭流粉磨closed core transformer闭口铁心变压器