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??? ??

?? 4??? ??? ??? ??? ??? ??.

?? ???? ??? ??? ??? ??? ??? ????: ????, ?? ??, ????, ????.

Professional Standard - Chemical Industry, ??? ??

• HG/T 2561-1994 ??? ??? ????? ??? ??
• HG/T 2561-2014 ??? ??? ????? ??? ??

Group Standards of the People's Republic of China, ??? ??

• T/NAIA 018-2020 ??? ??? ????? ??? ??
• T/NAIA 0165-2022 ??????????? ??? ?? ? ??? ?? ??????

??:   ???, ??? ???, ??? ???, ??? ??, ??? ? ???, ?????? ??? ??? ??, ???? ???? ???, ??? ? ???????, ??????? ???, ??????? ??, ASTM ??? ???, ?? ??? ? ???, ??????, ??????? ???? ??, ??????? ????, ??????? ??, ?? ??? ???, ??? ??, ??? ????, ???? ???? ??? ??.