The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level.
invented by Norikazu Sawazaki
A video tape recorder (VTR) is a tape recorder designed to record and play back…
invented by MITS
Altair 8800 is the spark that ignited the microcomputer revolution.
invented by Alexander M. Nicholson
A crystal oscillator is an electronic oscillator circuit that uses the…
invented by
Human spaceflight (also referred to as manned spaceflight or crewed…
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