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?? 8??? ???? ??? ??? ??.
?? ???? ???? ??? ??? ??? ????: ?? ??, ?? ? ??, ???, ??? ??, ?? ?? ??.
國家市場監督管理總局、中國國家標準化管理委員會, ???
Korean Agency for Technology and Standards (KATS), ???
AENOR, ???
ZA-SANS, ???
SCC, ???
- AS 1671.3:1975 ? ?? ?? ??, 3?: 2.5% ??? ??? 1.0% ??? ??? ? ? ?? ?? ??? ??? ???(???)
CZ-CSN, ???
International Organization for Standardization (ISO), ???
CU-NC, ???