Working with a file always takes a lot of time, particularly where its course is restricted: in a deep hole, in a curved channel. Here come to the aid of a power drill. Hold its cartridge needle file with round cross-section or chip of a round file with machined shank: spiral cut works great not only during forward movement but also during the rotation. I. POPOV, p. Konosha, Arkhangelsk region.
Recommend to read
THE EASTERN “MARTIAL ARTS”
A crushing defeat of Japan in 1945 radically changed the geopolitical situation in the far East, however, does not make this part of the globe calm. A series of bloody wars in China,...
SK-3 “KRASNAYA ZVEZDA”
Glider is a single cantilever monoplane with upper wing. The fuselage is pear-shaped, oval cross section, is formed by 15 frames, has two spars (top and bottom) a cross section of 10X10...
