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PDF Standards BS 1380-4-4.2:1979

Method for determining the speed of sensitized photographic materials. Specification for light sources for sensitometric exposure-Simulation of the spectral distribution of tungsten illumination
standard by BSI Group, 02/28/1979

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BS

PDF Standards BS 1363:1947

Two pole and earthing pin fused plugs and shuttered socket outlets for A-C circuits up to 250 volts (not intended for use on D.C.circuits)
standard by BSI Group, 06/30/1947

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