valven.瓣膜;真空管;阀门;电子管
Valve casing contaminated or worn电子管防护罩被污染或者破损
valveless piston expansion engine无阀活塞式膨胀机
valve hole critical gas-velocity临界阀孔气速
Valve Replacement/complications瓣膜置换术
valve-control sealed accumulator阀控式密封蓄电池
valved bovine jugular vein conduit牛颈静脉带瓣管道
Valve controlled asymmetry cylinder阀控非对称缸
valve regulated lead-acid battery密封阀控铅酸蓄电池