| 摘要 |
a starting fly wheel of a disk fixed to one side of a rotation shaft; a mass plate having a guide groove inserted to the starting fly wheel; and a compressing means connected to the starting fly wheel and mass plate so that the mass plate is pulled to the center of the starting fly wheel, the mass plate moving outside the starting fly wheel while pushing the compressing means due to the centrifugal force, thereby increasing moment of inertia.
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