Does your factory keep a quarterly maintenance log book on all electronic devices?
工厂保存一每季电子的装置维护记录书?。
All operating periods and maintenance work have to be entered in a log book.
所有运行周期和和维护工作必须记入工作日志。
All operating periods and maintenance work have to be entered in a log book.
所有运行周期和和维护工作必须记入工作日志。
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