normal valve type surge arrester 普通阀式避雷器
normal close valve 常闭阀 ; 常关阀
normal open valve [机] 常开阀
normal closed valve [机] 常断阀
normal end clearance angle valve 前锋正余隙角
gate valve normal boiler system 启闭阀常压锅炉系统
The leaflets were sewn to the normal valve annulus;
将切下的瓣叶缝合于正常三尖瓣环上;
In normal conditions, the opening control valve is moderate, even a small opening is short, so the normal valve can be used safely.
而在正常工艺条件下,调节阀的开度是适中的,即使小开度也是短暂的,所以调节阀可正常安全使用。
Corrosion products formed by these reactions can prevent normal valve operation and can become embedded in the elastomeric stem tip, preventing the valve from making a complete seal.
这些反应产生的腐蚀产物会阻止正常的阀门运转,深入到人造橡胶阀杆顶端,造成阀门不能完全密封。
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