1998GOST 6942-1998 Cast iron waste pipes and fitings. Specifications
1980GOST 6942.0-1980 Cast iron waste pipes and fittings. General specifications
0000 GOST 6942.0-1969
GOST 6942.0-1980 Cast iron waste pipes and fittings. General specifications was changed to GOST 6942-1998 Cast iron waste pipes and fitings. Specifications.