This simple device will help with the help of ordinary hand drills to cut holes of any diameter in the plywood, hardboard and particleboard.
Recommend to read
UNUSUAL ELECTROLET
With a slight rustle of the blades of the propeller model took to the air. Passed one circle, two, three. All this is familiar today in many circles of our country guys raise flying...
MIGOMOBILE FANTASY? TRUE!
A small group of enthusiastic scientists and engineers of the Department of theoretical mechanics of the Kursk Polytechnic Institute, working on the creation of an engine operating...