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
SOARING ABOVE THE WAVES
The hovercraft is. Building a vehicle that could move on both land and water, was preceded by a familiarity with the history of the discovery and the creation of original amphibious...
SWEET ROAD TRAIN
Not so long ago, after retiring, I seriously took up beekeeping. However, our region is not rich in honey-bearing plants, so during the season, I have to move the entire apiary from one...
