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
NUT — WEDGE
No, of course not with fire, as fire with fire as the saying goes, and... turn away. Because the wedge as the main element included in the design of the unusual wrench proposed Nikolaev...
DRAWS A SPATULA
We all know that the spatula is smooth steel or rubber plate intended for plastering work. However, it can be used for other purposes. If you want to put on a wall or ceiling a beautiful...
