| 摘要 |
PROBLEM TO BE SOLVED: To provide a string which does not expose yarns or fibers or does not produce yarn pieces or fiber pieces, even when used for a long period, and can highly retain a sanitary state and atmosphere cleanliness. SOLUTION: This string having high safety on sanitation is characterized by comprising a belt-like long core material and a long cylinder which covers the core and comprises a plastic film. COPYRIGHT: (C)2003,JPO
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