The pump works for seven years and is still on normal working condition.
泵站竣工运行七年，基本处于正常运行状态。
Derive a way to get the point estimations of parameters under normal working condition stress.
给出了求正常工作应力下参数点估计的方法。
The system normal working condition was recovered by reducing production output and carrying out corresponding operations.
通过减量生产，并采取相应操作，系统工况恢复正常。
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