Specification covers: lamps for general service; high-voltage, 40-watt, straight filament vacuum lamp in clear bulb; vacuum traction lamps series burning; gas-filled traction lamps series burning; vacuum and gas-filled train lighting lamps; gas-filled bus lamps. (See also Brit. Eng. Standards Assn. -- Specifications, no. 161, Oct. 1930, 59 pp., price 2s. 2d.)
British standard specification for tungsten filament electric lamps
Engineer
Engineer ; 150 , n 3902
1930
Article (Journal)
English
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