THE CONDUCTOR-TELESCOPE

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THE CONDUCTOR-TELESCOPEOf 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

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