| 摘要 |
A cutting tool comprises a tool bit having the configuration of a hollow pyramid which includes an open base and three side walls, each having an outer face. The adjoining outer faces define three cutting edges coverging in the apex of the pyramid. The cutting tool further has a base block with a recess for receiving the tool bit and a clamping device for tightening the tool bit, positioned in said recess, to the base block. |
