Often, after the hole is drilled,further or a clean, slightly to expand or to make a slightly oval shape. This work can be facilitated steel Bender, automating it with a drill in a cartridge which is inserted a circular, semicircular or even triangular needle file or similar file section. V. SIZIKOV
Recommend to read
A MODEL ROCKET CLASS S6A FROM KARELIA
Over the past 3 — 4 years in the lists of winners of major Russian competitions in sport flying are increasingly common names "rocket scientists" of the Republic of Karelia. So, on...
GAS SOLDERING IRON
In the practice of the rally often faced with the necessity of soldering or welding. A few years ago I accidentally saw used for this purpose, benzopyrene production of the GDR, then had...
