As a supplement, in sealed bellows fill the above letter is still preserved, but also increased the reliability and security.

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。

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As a supplement, in sealed bellows fill the above letter is still preserved, but also increased the reliability and security.

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。

youdao