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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 1610-1:1992

Materials testing machines and force verification equipment-Specification for the grading of the forces applied by materials testing machines when used in the compression mode
standard by BSI Group, 02/28/1992

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