气密封 meaning in English

airtight seal
hermetic seal

Finite element analysis of the spiral groove dry gas seals
螺旋槽干气密封的有限元分析
Preoxidation of kovar alloy for hermetic sealing
可伐合金气密封接的预氧化
Characteristic of gas film between spiral groove dry gas seal faces
螺旋槽干气密封端面间气膜特性
Effects of parameters of spiral groove gas face seals on seal performance
螺旋槽端面干气密封的参数研究
Numerical simulation of the face flow field on radial groove dry gas seal
径向直线槽干气密封端面流场数值模拟

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