| 摘要 |
PROBLEM TO BE SOLVED: To provide a digging claw capable of preventing its biting into a material to be dug from being not largely changed from the beginning of its use by keeping it sharp even if worn while it is used. SOLUTION: Since digging claw is curved, it is worn along the original shape of the claw. Accordingly, its sharpness is not lost since the shape is not largely collapsed. As a result, the state of the biting into the material to be dug not largely changed from the beginning of its use can be maintained. COPYRIGHT: (C)2006,JPO&NCIPI
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