不可否认极限条件导致失败，但在正常工作状态下，这种极限条件也会遇到的。

Admittedly, it had been placed under extreme conditions when it failed, but such forces are to be expected from time to time when the machine is running normally.

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并对压力容器的弹性极限、塑性极限、金属内衬不会产生反向屈服的最大内压以及压力容器在“安定状态”下工作的条件进行了理论分析。

Elastic and plastic terminal of vessel, maximum internal pressure that metal liner can't be yielded in the opposite direction and basic condition that vessel works on stable state are presented.

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