短语词组短语valved conduit 带瓣管道valved nozzle 单向喷嘴valved cracking 阀门裂解valved nipple 有阀的螺纹接头valved coupling 有阀的联接器valved tube 阀门管valved homograft 同种瓣valved stents 瓣膜支架 返回 valved