闸阀和截止阀（属与金属连接）阀座不具备不透气关闭的性能。

闸阀和截止阀（属与金属连接）阀座不具备不透气关闭的性能。的英文翻译

基本释义

• Gate and globe( metal to metal) seats cannot provide bubble tight shut-off. Resilient seated butterfly valves are bubble tight by design.