| 摘要 |
PROBLEM TO BE SOLVED: To provide a chain capable of easily preventing the lifetime from being shortened by the wear at low cost. SOLUTION: The chain 34 has a pin link 38 and a roller link 8 to be alternately connected to each other, and a protective block member 44 is attached to a part of an outer surface of a pin link plate 40 in the pin link 38. The lifetime can be easily prevented from being shortened by the wear at low cost. COPYRIGHT: (C)2009,JPO&INPIT
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