The end customer should give the seller all necessary background information about the trouble appearance, and make some tests according to the instructions of the seller's engineer.
最终用户应提供设备故障出现前后的背景情况供卖方分析，并在卖方技术工程师的指导下进行力所能及的测试；
The end customer should give the seller all necessary background information about the trouble appearance, and make some tests according to the instructions of the seller's engineer.
最终用户应提供设备故障出现前后的背景情况供卖方分析，并在卖方技术工程师的指导下进行力所能及的测试；
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