| 摘要 |
The headpiece is equipped with an aspiration system for continuously sucking up and removing shavings that are formed during machining of a flat board. To the headpiece are attached one or more shaft-like elements, which push on the board that is to be drilled via one of their elastically yielding edges, thus leaving exposed and encompassed between them an area of the board where the holes are to be made. A box, which is open toward the area where the holes are to be made and to which the aspiration system is to be fitted, is attached, over its entire length, to at least one of the shaft-like elements. |
