| 摘要 |
PROBLEM TO BE SOLVED: To elongate a service life, by suitably suppressing generation of a crack in a cog trough part 18. SOLUTION: A lower rubber layer 12 is constituted of a first rubber layer 21 formed on a core layer 13 side, and a second rubber layer 22 formed on a belt inner face side. Short fibers are mixed into the first rubber layer 21, and the second rubber layer 22 is made from rubber not containing short fibers. COPYRIGHT: (C)2009,JPO&INPIT
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