Jewel bearings with recess for instruments and meters

WITHDRAWN published on 1.1.1983

Porcelain bushing shell for transformer up to 35kV

WITHDRAWN published on 9.12.1983

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WITHDRAWN published on 1.1.1965

Technical condition of coal for metallurgical coke

WITHDRAWN published on 8.12.1998

Specification of coal for coke making

WITHDRAWN published on 1.6.2009

Steel pins for pin insulators used on over head power and telegraph lines

WITHDRAWN published on 1.1.1983

Numbering for automatic telephone in national communication network

WITHDRAWN published on 1.1.1983

Interoffice junction digital line signalling system for telephone automatic switching network

WITHDRAWN published on 15.12.1983

Relays for crossbar telephone switching systems

WITHDRAWN published on 6.10.1992

Crossbar switches

WITHDRAWN published on 6.10.1992