Then-hexane internal standard method or the standard gas external standard method is used for detection.
用 正己烷内标法或标准气体外标法进行检测。
The calibration method of leakage rate with the gas low range standard apparatus is introduced.
介绍了气体微流量标准装置对漏率的校准方法。
Explain the importance and necessary of the standard color applied to gas pipeline design.
阐明了站场工程设计采用标准色号的重要性和必要性。
Explain the importance and necessary of the standard color applied to gas pipeline design.
阐明了站场工程设计采用标准色号的重要性和必要性。
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