| 摘要 |
PURPOSE: A reamer is provided to improve working efficiency by keeping the concentricity and straightness of support units to a plurality of machining holes. CONSTITUTION: A reamer is composed of a cylindrical body(100), a first support unit(110) formed at one end of the body and inserted into a first machining hole, a second support unit(120) formed at the other end of the body and inserted into a second machining hole, and a reamer edge(130). The reamer edge is located between the support units, and reams the first and second machining holes.
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