| 摘要 |
When making holes in constructions, e. g. concrete beams, using a hollow drill (5) a fluid is supplied for removal of cuttings and/or cooling of the hollow drill. The fluid (19) is supplied on the outside of the hollow drill (5) and suctioned up through the interior of the hollow drill. A suction connector device (15), most suitably of the swivel type, upon connection between the hollow drill (5) and the drill (3) allows connection to a suction source (7).<IMAGE> |
