Language
GB /T 93 - 1987
SN 60727 (VSKZ)
SN 60727-2 (VSKD)
CNS 5053 - 1979
ASME B 18.21.2M - 1999 (R2014)
ASME B 18.21.1 - 2009 (R2016)
KS B 1324 - 2017 (R2022)
NF E 25-515
CNS 8930 - 1982
CNS 161 - 1994
BS 4464 - 1969
BS 4463 - 1969
UNI 1751 - 1941