NFPA 50 大容量氧气系统现场应用标准
日期:2012-02-09 16:44
the authority having jurisdiction shall be permitted to apply retroactively any portions of this standard deemed appropriate.
The retroactive requirements of this standard shall be permitted to be modified if their application clearly would be impractical in the judgment of the authority having jurisdiction, and only where it is clearly evident that a reasonable degree of safety is provided.
1.1.3 This standard shall not apply to oxygen manufacturing plants or other establishments operated by th
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