| 摘要 |
A reversible cutting bit has, in a view of the bit plane, cutting projections which are at an angle of approximately 90 DEG to one another, so that the basic shape of the reversible cutting bit is angular. In order to obtain reversible symmetry, the cutting bit is constructed in fold-symmetrical manner to a fold axis located in the angle bisector between the projections, so that the in each case not used cutting edge is located on the bottom of the cutting bit.
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