having a metallic vapour as the principal constituent

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Industry

CPC
H01J7/08

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Parent Industries

HELECTRICITY H01Electric elements H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS H01J7/00Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps

Current Industry

H01J7/08having a metallic vapour as the principal constituent

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