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DE??? ? ??
?? 8??? ??? ? ??? ??? ??? ??.
?? ???? ??? ? ??? ??? ??? ??? ????: ???, ??, ?? ??, ??? ??.
American Welding Society (AWS), ??? ? ??
AWS - American Welding Society, ??? ? ??
Standard Association of Australia (SAA), ??? ? ??
SCC, ??? ? ??
Hebei Provincial Standard of the People's Republic of China, ??? ? ??
Guangdong Provincial Standard of the People's Republic of China, ??? ? ??
Professional Standard - Cultural Relics Protection, ??? ? ??