What if you need to draw a circle, and a compass at hand is not! To get out of this situation by making a simple compass of the bent and strapped to the pencil in the right place for a stylus pen, as shown in the figure.
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THE INSTRUMENT OF THE MIRACLE WATER
Long known as enjoyed a fabulous "live" and "dead" water Prince Ivan. Surprisingly, the principle of treatment it is obtained by electrolysis, is the same. First sore spot, for example...
SPACED AXIAL
To hold the centerline on the workpiece will help the device shown in the figure.
