Language
DIN 6901 - 1990
JIS B 1188 (T1D) - 1995
GB /T 9074.18 (S2) - 2017
GB 9074.21 - 1988
GB /T 9074.20 - 2004
GB 9074.19 - 1988
GB /T 9074.18 (S2) - 2002
NF E 25-523 - 1999
GB /T 9074.18 (S2) - 1988
GB /T 9074.20 - 1988
JIS B 1129 - 1999