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As an application of the ERF to a practical device, coaxial twin rotary cylinders, in which the rotation of an inner driving cylinder is transmitted to an outer rotary cylinder through the medium of an ERF, was designed, and the revolution rates of both cylinders were examined. As another application, a simple shock absorber having coaxial cylindrical electrodes without the bypass was designed and the falling time of an inner moving rod was measured.
The quantitative relationship between the applied electric field and the revolution rate and the falling time was obtained experimentally.