| 摘要 |
This apparatus consists of the rotating main board(4) which turns by the driving force of motor (20), the control bar(1) which has the control weight(3) movable freely and is equipped to rotate freely at the rotating axis(6) on support means(7) in the rotating main board(4), and the semicircular percepter(9) which is equipped on the outside of the rigidly circular board(10).
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