
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.
Recommend to read
FRISKY “FI-FI”
Carrier-based fighter Grumman FF-1. Aircraft manufacturing firm Grumman Aircraft Engineering Corporation began work with the U.S. Navy in the late 1920-ies First, she collected the...
THE SPEED CHANGE RODS
As you know, for different road conditions: descents, climbs — many types of bikes use a block of sprockets of different diameters for changing torque to the rear driving wheel. These...