valve oil阀油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Valve controlled hydraulic cylinder阀控液压缸valve-regulated lead acid battery阀控式铅酸电池

1. Presents the development and use of new stainless steel heap welding technique for main steam valve sealing surface.
   介绍了主蒸汽阀门密封面不锈钢堆焊新工艺的开发与利用。
2. If the spacing between mating flanges is tight, the valve sealing surface should be coated with a lubricant to prevent distortion during installation.
   如果配置的法兰之间的间隙过紧，则阀门密封面应该用润滑剂涂敷以防止在安装过程中产生扭曲变形。