Language
CNS 4377 - 1983
CNS 4067 - 1983
BS 325 - 1947
BS 916 - 1953
GB /T 85 - 2018
UNI 6050 (C) - 1967
UNI 5597 - 1965
UNI 5729 - 1965
NF E 25-608 - 1985
NF E 27-412 - 1973
DB37/T 2394 (P) - 2013
BS 7670-1 - 1993
BS 7419 - 1991
BS 1981 - 1991
BS 4183 (T8) - 1967