I need technical assistance, and the MES receiving level is very low with abnormal operation.
我需要技术援助，移动站接收电平太低，工作不正常。
The abnormal vibration of main fan operation in a certain mine is introduced.
介绍了某矿井主通风机运行时的异常振动现象。
The abnormal vibration of main fan operation in a certain mine is introduced.
介绍了某矿井主通风机运行时的异常振动现象。
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