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DE??? ? ?? ??
?? 15??? ??? ? ?? ??? ??? ??? ??.
?? ???? ??? ? ?? ??? ??? ??? ??? ????: ???, ????.
VN-TCVN, ??? ? ?? ??
Professional Standard - Agriculture, ??? ? ?? ??
Indonesia Standards, ??? ? ?? ??
Spanish Association for Standardization (UNE), ??? ? ?? ??
Xinjiang Provincial Standard of the People's Republic of China, ??? ? ?? ??
Gosstandart of Russia, ??? ? ?? ??
American Society for Testing and Materials (ASTM), ??? ? ?? ??
Professional Standard - Forestry, ??? ? ?? ??
Association Francaise de Normalisation, ??? ? ?? ??