EXACTLY SPIRAL

JUST A SPIRALDevice for spiralno lines are usually quite complex in design, can not be said about the method of its receipt. A circular boss fixed to prepared for the drawing surface; the wound on the boss thread, and the other end tied on pen or pencil — that’s all, “device”, which is clear from the figure.

Recommend to read

  • RELIABLE STANDRELIABLE STAND
    To books on the shelf stood upright, their back so those are the footings of two scrap boards connected at a right angle, and a reinforcing cross member. However, on the polished surface...
  • IN FLIGHT – HANDIN FLIGHT – HAND
    After a paper dove, the boys are starting to build paper airplanes and send them flying from the balconies of the upper floors. Here it is born the love for model airplanes? We...