Of tubes of different diameter, tightly placed one on another, you can build a jig for drilling end holes in cylindrical rods of various cross sections. For the outer bushings are better to use a steel tube with a thickness of 0.5 mm, and the inner insert can be bent any sheet metal. V. MARTINTON, Novocheboksarsk
Recommend to read
SCALE THE HEATERS NOT TERRIBLE
holiday cottages or dwelling houses of the manor type of water is generally pumped from wells or boreholes. Heat it for domestic use often in electrotechno (pass-through or cyclic...
WOOD STOVE AIR…
A pity to throw away scraps of plywood, thin boards, chipboard, even if there is no place to apply them. However, I have a suggestion: make from scraps of a kind of wood-air oven....
