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DE??? ??? ??
?? 5??? ??? ??? ??? ??? ??? ??.
?? ???? ??? ??? ??? ??? ??? ??? ????: ??? ??, ??, ???? ? ?? ??, ?? ?? ???.
Group Standards of the People's Republic of China, ??? ??? ??
Gansu Provincial Standard of the People's Republic of China, ??? ??? ??
國家市場監督管理總局、中國國家標準化管理委員會, ??? ??? ??
Professional Standard - Energy, ??? ??? ??
Professional Standard - Machinery, ??? ??? ??