Sales occurring in the pencil with eraser on the end is very convenient: it is always possible to erase an inaccurate line or bar.
However, to make such a pencil, if you use the appropriate cap from a ballpoint pen.
Cut off the top cap and insert the carved from a school eraser cylinder.
Recommend to read
“ETERNAL” INSCRIPTION
Sometimes you have to print the typed text directly on the photos, but with the inscriptions erased. Will protect their hair, applied a thin layer of aerosol container. Vladimir...
THE SOLENOID
So, you are already familiar with the electromagnet, knows how to work the buzzer and electric bell (see "M-K" No. 8 this year). But there is a large group of Electromechanical devices,...
