Abstract: The invention is directed to a method for drilling multilayer printed circuit boards, and is also directed to a printed circuit board drill for the implementation of this method. When, based on a known measuring procedure, an offset of the interior layers of the printed circuit boards relative to the rated position is identified, the drill spindles must be appropriately adjusted before drilling in order to avoid rejects. This, however, has the disadvantage that respectively only one printed circuit board can be drilled at one time. Contrasting therewith, the invention provides that the seating plate for the printed circuit board of the drill can be designed variable with respect to the drill spindle, so that a plurality of seating plates can now be adjusted independently of one another. As a consequence, the employment of multi-spindle drills becomes possible.

Abstract: A table tennis net holder which includes a holding plate insertable into a transverse slot or gap of a sectional tennis table, and equipped with a post at its outer free end for connecting thereto one end of the tennis net. At least that inner portion of the holding plate which in mounted position of the holding plate is adjacent the tennis table is provided with a transverse web limiting the extent to which the holder can be slipped into the tennis table and has a T-profile, the vertical web of which is at its lower portion provided with clamping means, e.g. in the form of round elastic clamping members, on both sides of the vertical web. These clamping members are adjustable relative to the holding plate to take care of variations in the thickness of the tennis table to which the holder has to be fastened.