valven.瓣膜;真空管;阀门;电子管
Valvectomy瓣膜切除术
valve cock阀栓
valve bank阀组
valve flap阀瓣
valve seat阀座
valve test瓣膜试验,电子管试验
Valve lilt气门升程
valve bush阀衬,阀套
valve ring活门环,气门环
valve gear阀动装置