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PDF Standards BS 142-3-3.1:1990

Electrical protection relays. Requirements for single input energizing quantity relays-Specification for single input energizing quantity measuring relays with non-specified time or independent specified time
standard by BSI Group, 12/31/1990

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BS

PDF Standards BS 4099-1:1986

Colours of indicator lights, push-buttons, annunciators and digital readouts-Specification for colours of indicator lights and push-buttons
standard by BSI Group, 04/30/1986

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