| 摘要 |
A rotary hole punch (T) comprising a cylindrical head (10) with circular section, the free end (11) of which can be gripped by a means able to drive said hole punch rotationally, a cylindrical tube (20) of circular section, attached to the inner end (12) of the head (10), and ending in a cutting edge (21), characterized in that the head (10) of the hole punch includes at least one duct (13) making it possible to feed a fluid under pressure inside the tube (20) at the level of the inner end (12) of the head (10).
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