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British Standards Institution (BSI), ??? ????

PL-PKN, ??? ????

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

Professional Standard - Agriculture, ??? ????

SCC, ??? ????

American Society for Testing and Materials (ASTM), ??? ????

Korean Agency for Technology and Standards (KATS), ??? ????

International Organization for Standardization (ISO), ??? ????

VN-TCVN, ??? ????

Lithuanian Standards Office , ??? ????

GOST, ??? ????

Hebei Provincial Standard of the People's Republic of China, ??? ????





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