valve closure

Impact of Percutaneous Device Implantation for Closure of Patent Foramen Ovale on Valve Insufficiencies.

经皮介入封堵卵圆孔未闭对瓣膜关闭不全的影响.

Metal cock ring soft seat surface pressure to the bearing surfaces, such as the valve core and valve seat is concentric ring surface can be a double tight closure.

金属旋塞表面压向阀座环软支座表面，如阀芯和阀座环表面是同心的，就能得到双重严密的关闭。

Unidirectional valve patch ( UVP) were used to repair theVSD; The application of high frequency jet ventilation in anesthesia of video-assisted thoracoscopic surgery in the closure of ventricular septal defect

术中应用顺单向活瓣补片修补室缺；高频喷射通气用于胸腔镜下室缺修补术的麻醉

The elimination of measures: relief valve and tank closure and other measures to prevent water hammer.

消除措施: 缓闭阀及调压井等其它防止水锤措施.

Design of lift type slow closure check valve

升降式缓闭止回阀设计

The second step is to select the closure may be required to meet the speed of the check valve type.

第二步是选择有可能餍足所需要的关闭速率的止回阀类型。