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
A-7 FOR
N. Kamov, getting to the first combat autogyro, designed for communications, reconnaissance and correction of artillery fire, already had experience of creating such helicopters,...
FUN SWING
A common attribute of most of the country and personal plots are swings for children. The production versions are many. Swing you can make, as metal pipes and profiles and timber. The...
