To spend simply a circle on a plane costs nothing with the help of a compass. But what if this line should cover a cylindrical billet? For a rough layout, you can use string or a rubber ring. The marking will be more accurate if the workpiece perpendicular to lower the fluid: boundary wetting will become the desired line. Another option is to wear to the cylinder tube of suitable diameter or wrap it with a strip of paper, foil.
Recommend to read
THREAD-LOCK
the Stopper of a thermos under prolonged exposure to high temperatures over time, weakens and poorly kept in the neck of the vessel. A reliable lock can provide a strong thread or thin...
RELAY HALF-TRACK VEHICLES
Lenin in Gorki near Moscow in the spacious garage, which is included in the exposition of the House Museum of V. I. Lenin, it is an unusual machine: instead of rear wheel rollers with...
