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
“BREAKING” MALOGRUZOVAJA
Like many readers of the journal "modelist-Konstruktor", fond of design — so more than the others interest me in the magazine sections of the "Social Bureau" and "Small-scale...
BOAT AQUARIUM
How not to help the little Katya to see how the swimming fish! During boat rides with grandpa Victor on the lake it was peremeshivaete across the Board, trying to see underwater...
