512 Spin Type Electroscope
This simple device can even detect a charged friction rod. It consists of a metal arm with a hub at its center and oppositely directed points on each end. The arm pivots on a needle bearing on an insulated stand. When a charged rod is brought close to the points, the electroscope begins to spin. In stronger fields, the speed increases. The spinning arms are 15cm in diameter.
We have 70 skillful operators, 5 machine mechanics and 31 quality inspectors, total annual output capacity in design can reach 130 millions sets.
Earth & Space Science
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