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BS

PDF Standards BS 2649-2:1957

Methods for the analysis of glass-Recommended procedure for the analysis of soda-boric oxide-alumina-silica glasses of high silica and boric oxide content
standard by BSI Group, 08/30/1957

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BS

PDF Standards BS 196:1927

Reversible protected-type two pin plugs and sockets with earthing connections (for circuits up to 250 volts between two poles)
standard by BSI Group, 08/12/1927

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