abnormal operation of generator 发电机异常运行 abnormal noise during operation 操作时不正常噪音 frequency abnormal operation 频率异常运行 ..
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No mechanical seal leakage or abnormal vibration or noise occurred to the two pumps during operation.
两台泵在运转过程中均未见有机械密封泄漏现象发生，也未见有异常的振动和噪声。
The reason why the abnormal noise occurs during operation of diaphragm gas meter is analyzed, and the corresponding solution is put forward.
分析了膜式燃气表运行过程中有异常噪声的原因，提出了相应的解决方法。
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