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 simplicity of the “Arfa” design is probably unique. The vehicle has only six main parts: a frame with an engine, a rear axle, wheels, a ski with a steering rod, and a steering wheel....
EXTENSION TUBE-DOUBLE
To connect to the same outlet multiple appliances generally use twins, tees and various extenders. Their designs are very diverse. But here's another one, in my opinion, the simplest....
