| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that a coreless crawler, so to speak, is sometimes excessively deformed, causes damage such as cracks or chips, abnormal engagement release called as tooth skipping, or dewheeling when a driving protrusion is engaged with a driving pin of a driving wheel. SOLUTION: A first reinforcing member 14 is provided along a protruding shape of the driving protrusion 4. Therefore, the damage or driving failure of the driving protrusion 4 can be prevented.
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