Device 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
THE CARRIER ROCKET “VOSTOK”
"I looked at the ship, which was in a few minutes to go in the unprecedented flight. He was handsome... I Thought that this beauty is eternal and will remain for the people of all...
REPAIR RIM
Modern glasses, in spite of their diversity, have identical mounting handles to the frame. However, the designers made them so that no special tools to replace the broken shackle is not...
