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DE???? ?? 1 ? 2
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Group Standards of the People's Republic of China, ???? ?? 1 ? 2
IX-FAO, ???? ?? 1 ? 2
RU-GOST R, ???? ?? 1 ? 2
工業(yè)和信息化部, ???? ?? 1 ? 2
Professional Standard - Petroleum, ???? ?? 1 ? 2
Qinghai Provincial Standard of the People's Republic of China, ???? ?? 1 ? 2
German Institute for Standardization, ???? ?? 1 ? 2
American Society for Testing and Materials (ASTM), ???? ?? 1 ? 2
Japanese Industrial Standards Committee (JISC), ???? ?? 1 ? 2
Instrument Society of America (ISA), ???? ?? 1 ? 2
- ISA 12.12.03-2011 Class I ? Class II Zone 2, Class I Zone 2, Class III Zone 1 ? Zone 2 ??(???) ??? ???? ??? ?? ??? ?? ??
未注明發(fā)布機構(gòu), ???? ?? 1 ? 2