If in a ballpoint pen out of toothpaste, and long rods at hand was not, take the short splice and its extension from the part used stem, cut off from the writing site. To the working rod wrote flawlessly, its tube should be communicated with the atmosphere. Therefore, carefully wash the extension after removing it the bulb. N. RYZHOV, Ust-Kamenogorsk
Recommend to read
SMOOTH SWITCH
Usually automatic device switch on and off the Christmas tree lights in leaps and bounds, without changing the brightness. But the electronic switch scheme is presented in figure — does...
ELECTRIC CARS OF THE USSR
Rare video about the production of electric vehicles in the USSR. Be sure to see to understand that at the time we were "ahead of the rest" in development of such technologies. In the...
