常用短語

gas-tightness test氣密性試驗(yàn)

Test method for gas-tightness氣密性測試方法

capsule gas tightness氣密性

gas-tightness不透氣性

Gas Tightness Good氣密性好

leak gas tightness密閉度

gas tightness test氣密性試驗(yàn)

concrete gas-tightness混凝土氣密性

gas tightness detection氣密性檢驗(yàn)