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PDF Standards BS 4794-2-2.20:1982

Specification for control switches (switching devices, including contactor relays, for control and auxiliary circuits, for voltages up to and including 1000 V a.c. and 1200 V d.c.)-Position switches with positive opening operation
standard by BSI Group, 03/31/1987

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PDF Standards BS 3900-B1:1965

Methods of test for paints. Tests involving chemical examination of liquid paints and dried paint films-Determination of water by the Dean and Stark method
standard by BSI Group, 12/15/1965

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