The test laboratory quality control includes internal and external quality control method.
检测实验室质量控制分为内部质量控制和外部质量控制。
Observation. Observation is an effective method to test the operation of internal control (e. g., separation of duties) without written record.
观察。观察是测试不留下书面记录的控制(如职责分离)的运行情况的有效方法。
Internal corrosion control technology in pipeline includes gravity drop method to measure corrosion speed and pour into anti-corrosion doze.
输气管道内腐蚀控制技术包括采用失重挂片法测量管道内腐蚀速度和加注缓蚀剂等。
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