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BS 1151-2:1961

Guarenteed minimim reckoners for the building and civil engineering contrscting industries
standard by BSI Group, 09/01/1961

BS 1256:1945

Malleable cast iron (whiteheart process) and cast copper alloy pipe fittings for steam, air, water, gas and oil. Screwed b.s.p. taper male thread and parallel female thread.
standard by BSI Group, 07/27/1945

BS 1121-36:1956

Methods for the analysis of iron and steel. Copper in iron and steel (absorptiometric method)
standard by BSI Group, 11/09/1956