对金属辅助密封结构，有效地控制阀门的内漏和外漏。
To metal seal is provided to effectively prevent both internal and external leakage of the valve.
作为辅助密封，在波纹管上面依然保留了填料函，更增加了可靠性和安全性。
As a supplement, in sealed bellows fill the above letter is still preserved, but also increased the reliability and security.
从密封结构改进的角度，提出了带有端面辅助密封作用的刀口机械密封结构及设计的基本思想。
From the Angle of the structure improvement, this paper puts forward the idea of edgy machine that takes assistance sealing structure.
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