Systems and Communications

Systems and Communications

4.11 - 1251 ratings - Source

... an automatic fife changer where an electronic filter-control automatically test the pressure difference between the two ... It is portable and battery powered and therefore suitable not only for laboratory use but also for field measurements. ... than a packet of cigarettes, controls one or severaa#39; fluorescent lamps in such a way that at any time only ^e necessary ... The regulation, performed either manually by turning a knob or automatically using a photo cell, results in a minimum light bill.

Title:Systems and Communications
Publisher: - 1965

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