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DE?? ?? ??
?? 9??? ?? ?? ??? ??? ??? ??.
?? ???? ?? ?? ??? ??? ??? ??? ????: ?? ??, ?? ? ???? ??, ?? ? ???? ??, ??? ???.
International Organization for Standardization (ISO), ?? ?? ??
Spanish Association for Standardization (UNE), ?? ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ?? ??
American Petroleum Institute (API), ?? ?? ??
PL-PKN, ?? ?? ??
ESDU - Engineering Sciences Data Unit, ?? ?? ??
Professional Standard - Machinery, ?? ?? ??