If the angular groove in the part requires the processing of a triangular file, but only one side with a notch (nearby to not participate in it), tape it temporarily any adhesive tape (e.g. Scotch tape or duct tape).
Recommend to read
ERASER-“ELECTRONIC”
Almost every family today is an Amateur digital camera, from simple "soap box", no special adjustments (so to the uninitiated, the sellers say that "the exposure is set...
ALL-TERRAIN VEHICLE OF JUNKS
"For ten years this versatile motorcycle is my indispensable assistant, shares with us A. Belyaev from the village of dzhonka Khabarovsk region. In winter the rear wheel I replaced the...
