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BS

PDF Standards BS 196:1930

Reversible protected-type two pin plugs and sockets with earthing connections (for circuits up to 250 volts between two poles)
standard by BSI Group, 10/01/1938

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PDF Standards BS 2080:1974

Specification for face-to-face, centre-to-face, end-to-end and centre-to-end dimensions of flanged and butt-welding end steel valves for the petroleum, petrochemical and allied industries
standard by BSI Group, 03/31/1986

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