Language
GB /T 16824.2 - 1997
GB /T 16824.1 - 1997
BS 4174 - 1972
GB /T 16824.2 - 2016
NF E 25-664 - 1986
UNI 6949 - 1980
NF E 25-662 - 1994
YJT 4063 (WN1446C)
CNS 4308 - 2000
ASME/ANSI B 18.6.3 - 2010
IFI 502 - 1982
JIS B 1123 - 1996
JIS B 1126 - 1995
JIS B 1127 - 1995
AS /NZS 4402 - 1996
AS /NZS 4409 - 1996