one original board so that for reproduction it needs to be wired again in view of the above the present invention has been made after hard study and research the main characteristic of this invention is that the inside edges of all of the holes for plugging in electronic parts and components on the p c board should be plated with a metal layer and all such holes should be connected together into a conductive path in the the printed circuit method and during the process one can use a blade to cut off some metal conductors on the printed circuit and let only certain holes be rendered independent i e not be connected with any other hole or only be connected with some certain specified holes in such a way one can cut off the conductors properly in accordance with the layout of the circuit and obtain the required p c board by means of a practical example the invention is further explained as follows fig1 shows a p c board according to this invention by way of explanation for preparing a crossed mesh of parallel metallic lines or traces to show the details we will follows a real case fig1 shows parallel metal lines on the first side of a p c board and the distribution status of pass through holes 2 x i x i 1 etc are the first group of parallel metal conductor traces y i y i 1 etc are the second group of parallel metal conductor traces elements 2 are the pass through holes between the parallel metal conductor traces and on every separate crossing point of the parallel metal conductor traces and on the inside edge of such pass through holes a.