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DE???? ?? ?? ??
?? 9??? ???? ?? ?? ??? ??? ??? ??.
?? ???? ???? ?? ?? ??? ??? ??? ??? ????: .
Danish Standards Foundation, ???? ?? ?? ??
American Society of Mechanical Engineers (ASME), ???? ?? ?? ??
Professional Standard - Aviation, ???? ?? ?? ??
ESDU - Engineering Sciences Data Unit, ???? ?? ?? ??
Military Standard of the People's Republic of China-General Armament Department, ???? ?? ?? ??
The Aluminum Association, ???? ?? ?? ??