| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of selecting a separation system in accordance with use conditions. SOLUTION: A feed roller unit 31 is such unit that corresponds to a roller separation system, consists of a feed roller 41, a shaft 42, and a gear 43, and can be mounted on and dismounted from a mounting part 35. A feed roller unit 32 is such unit that corresponds to an overlap system, consists of a feed roller 44, a shaft 45, and a gear 46, and can be mounted on and dismounted from the mounting part 35.
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