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IS:9900 (Part IV) - 1981

IS:9900-4 (1981): High pressure mercury vapour lamps, Part 4: Go and no-go gauges of lamp caps. (Superseding IS : 2183 and IS: 7023) [ETD 23: Electric Lamps and their Auxiliaries]

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IS:9900 (Part IV) - 1981

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