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
INSTEAD OF A CUP
Adults well have them on the shelf in the bathroom for toothbrushes and combs has a special Cup. And children this is not a put — afraid they'll break. However, if you take...
INSTEAD OF A MICROPHONE — DYNAMIC HEAD
When there are dynamic microphone, you can substitute any small-sized dynamic head. Here's what proposes to make to the Yugoslav magazine "Radio Amater". Since the voltage developed by...
