To work poster pens are very convenient, and who was fine — what makes them miracles: you can always pick up the desired width of the line, replacing the pen on the right more. But each can hold only one “track”. But this small improvement allows us to obtain two parallel lines… in a single pass. For this, needle files propisyvaetsya portion of the working edge of the Pera: are formed like two pens in one.
Recommend to read
EASY SHOVEL
When I want to emphasize that someone has done a great job, in search of a suitable comparison involuntarily turn to the laborious digging of the earth and say: "They shovelled so much!"...
START IN THE “SMALL” SPACE
Build model rockets. The first manned flight into space, our compatriot Yuri Gagarin in 1961 was the beginning of a new the directions of technical creativity — rocket-and-space...
