Methods for analysis and testing of coal and coke. Ultimate analysis of coke
standard by BSI Group, 08/21/1970
Specification for domestic appliances burning town gas. General requirements
standard by BSI Group, 10/12/1962
Electrical protection relays. Requirements for the principal families of protection relays-Specification for thermal electrical relays
standard by BSI Group, 05/31/1991
Specification for galvanized mild steel wire for armouring cables
standard by BSI Group, 06/14/1948