2014WJ/T 415-2014 Specification for sealing wax for optical instruments
1994WJ 415-1994 Specification for sealing waxes for optical instruments
0000 WJ 415-1965
WJ 415-1994 Specification for sealing waxes for optical instruments was changed to WJ/T 415-2014 Specification for sealing wax for optical instruments.