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
ELECTRIC VEHICLE “PROTON”
The late XIX and early XX centuries - the first self-propelled carriages, steam engines and internal combustion (well, come on) electric! Incidentally, the first threshold speed in a...
MOSKVICH 400
He appeared on the streets of the capital shortly after the war, in 1947. At first glance the design of the car "Moskvin-400" was not fundamental innovations. Its main advantage was a...
