American Water Pumping Windmill History with an early Dempster Vaneless Windmill shown in slow motion. This shows the windmill regulating by centrifugal force.
Негізгі бет Dempster Vaneless Windmill
American Water Pumping Windmill History with an early Dempster Vaneless Windmill shown in slow motion. This shows the windmill regulating by centrifugal force.
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