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.
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Mil Mi-28
An experimental model of anti-tank combat helicopter Mi-28 first flew on 10 November 1982. Was built four prototype — they completed the full cycle of state tests. Rotor...
“SKATE” OUT OF THE PIPE
At roofing ridge site is covered with a special asbestos-cement templates. If not, then you can take advantage of the atomized along the axis of the plastic or steel pipes.
