
To measure the thickness or diameter of small fasteners do not have to have a caliper: rescue improvised version of conventional clothespins. It is sufficient to attach the metal plate coated with graduations as shown in the figure.
I. KORENEV, Korolev, Moscow region
Recommend to read
THE GYM IN THE APARTMENT
Even in a small room it is possible to allocate a place under a sports area, as required for the normal development of the child. "Club Home of the Masters" already familiar with similar...
MODEL SUBMARINE WITH A RUBBER MOTOR
Submarines — class ships to naval fleets, is designed for attacking ships and land-based enemy targets from a submerged position. They are divided into missile and torpedo. The...