The result proved the seal's good leak tightness, stability, reliability and economical efficiency.
使用的结果证明说明该密封具有优良的密封性、稳定性、可靠性和经济性。
The building's outer Windows with a large heat transfer coefficient and a poor leak tightness are the key positions, where energy is consumed.
建筑外窗的传热系数大，气密性差，是建筑能耗的重点部位。
Flexible disc springs automatically provide leak tightness by exerting pressure, which keeps the upper and lower valve sealing rings compressed at all times.
柔性盘簧始终使上、下阀门密封环处于受压状态，自动密封防漏。
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