With the active use of simple or colored pencil have to sharpen often, and he is quickly reduced to an uncomfortable size.
However, the stump is still some time will, if inserted in a suitable cap from a ballpoint pen. By the way, inserting a pencil the other side, it can be carried in a pocket without fear of damaging the stylus.
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Monophonic electronic musical instrument (see figure) is assembled on a single chip К176ЛА7 containing four two-valve "AND—NOT". On D1.1 is made the generator of frequency vibrato. The...
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To tighten the screw or screw in the narrow and in-depth place, the craftsmen make various simple devices for the temporary retention of fasteners. Here is one of them — using two...
