| 摘要 |
PURPOSE: A gear assembly is provided to continuously use residual parts without replacement when a gear unit of a rolling roll is damaged. CONSTITUTION: A gear assembly(40) comprises a body(410), a gear unit(420), and coupling units(430,440). One end of the gear unit touches one end of the body, and the other end has a gear. The coupling units detachably couple the gear unit to the body. A multistage protrusion(411), corresponding to the facing surface of the gear unit, is formed in one end of the body.
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