| 摘要 |
Nibbling mechanism (100) for producing a plurality of indented surfaces within a cavity within a construction material (160) including a tube, a plurality of cutters and a cutter moving mechanism, each of the cutters (104) being coupled with the tube (120), the tube (120) being rotatable by a power shaft rotator, the tube including a tube longitudinal axis, the plurality of cutters (104) producing the plurality of indented surfaces within the cavity, the cutter moving mechanism forcing the plurality of cutters (104) in a radial direction away from the tube longitudinal axis toward the cavity, thereby producing the plurality of indented surfaces, wherein the cutter moving mechanism can be inserted into the tube (120). |
