| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotating means capable of smoothly rotatingly pulling out a material wound into a roll shape. SOLUTION: This rotation ring is equipped with a friction reducing material 3 between a ring-shaped component 1 in contact with the material wound into the roll shape and a ring-shaped component 2 in contact with a base. COPYRIGHT: (C)2007,JPO&INPIT
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