| 摘要 |
PURPOSE:To improve the finish face accuracy and the work efficiency by constructing a multi-blade tool having more than two edges integrally. CONSTITUTION:Each edge of a multi-blade tool having more than two edges 3, 4 such as a chaser tool 1 is made of different material having high tenacity and high abrasion withstandability or provided with different edge shape then a material is cut by said tool. |
