00476nam a22001457a 4500 1160 1160 200110b ||||| |||| 00| 0 eng d 621.184 B9169 746 British Standards Institution Valves, gauges and other safety fittings for land boiler installations, BS:759:1950 London by British Standards Institution 1950 23p. 2.01 Boiler Safety BK 0 0 ddc 0 621_184000000000000_B9169 0 3585 CL CL 1952-12-29 Wheeler 621.184 B9169 00966 2020-01-10 BK 0 0 ddc 0 621_184000000000000_B9169 0 3586 CL CL 1952-12-29 Wheeler 621.184 B9169 00967 2020-01-10 BK