Mercury vacuum pump being used to evacuate (exhaust) light bulbs on commercial scale c1883. Pump here is Geissler's as modified by Topler and was type used by the Swan Company. From R. Wormell Electricity in the Service of Man London 1896. Engraving

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Creative#:

TOP09101190

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

NO

Property Release:

NO

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No

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