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BS 140:1923

Liquid starters for electric motors (d.c and a.c-phase 3 induction with slip rings)
standard by BSI Group, 05/31/1923

BS 137-1:1982

Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1000 V-Methods of test
standard by BSI Group, 05/31/1982

BS 130:1923

Totally enclosed air-break circuit breakers for voltages not exceeding 660 volts
standard by BSI Group, 01/30/1933