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PDF Standards BS 116-1:1937

Oil circuit-breakers, oil switches and oil isolating-switches, for alternating-current circuits. Three-phase oil circuit-breakers with breaking-capacity ratings up to 500 mva single phase oil circuit-breakers, oil switches, and oil isolating-switches
standard by BSI Group, 01/27/1953

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BS

PDF Standards BS 1428-C2:1954

Microchemical apparatus. Apparatus for the determination of organic groups.-Specification for acetyl group determination apparatus (Wiesenberger)
standard by BSI Group, 02/11/1954

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