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Gregory Galkin
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11,988. Galkin, G. May 22. P r e s s u r e - regulating valves.-An air-pressure regulating-valve for petroleum incandescent lamps consists of a valve t carried and controlled by a diaphragm s. The air, after passing through the valve, operates on the diaphragm, in opposition to a spring u; to effect the control of the valve.
GB190611988D1906-05-221906-05-22Improvements in Petroleum Incandescent Lamps.
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