Thin-walled tube of soft metal when you try to bend often creased. To avoid this, they are usually pre-stuffed with sand.
With the same purpose, you can use another method: navit on the future site of bend copper or aluminum wire – turns will not allow the tube to wrinkle at the bend.
The same result can be achieved using a suitable inner diameter of the spring.
Recommend to read
AND PAINT, AND LACQUER
Few people know that packaging Styrofoam is the perfect base for the manufacture of varnishes and paints. The first are obtained by dissolving the foam in solvent "647" or butyl acetate....
SHELF STAND
Now even at primary school pupils the abundance of tutorials and various secondary sources. So the books were always at hand and at the same time did not create the mess table, make this...
