这两个库有着相同的基本设计缺点。

The two libraries share the same fundamental design flaw.

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焊法兰的主要设计缺点是它不能保证无泄漏。

Flat welding flange of the major design drawback is that it can not guarantee no leakage.

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然而，ANSI法兰的主要设计缺点是它不能保证无泄漏。

However, ANSI flange design of the main shortcomings is that it can not guarantee no leakage.

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