
Tungsten copper board file is a file fitter filing of tool steel, steel file sub-flat, round, square, angular, five and a half, flat to flat file also challenge the filing, circle is round file, square is square file, triangular file angle, half semicircle filing, the board filing can also be called flat file. More details of tungsten copper plate please visit ?http://www.tungsten-copper.com/tungsten-copper-plate.html Tungsten copper file is after pressing by the mixed powder, liquid phase sintering at 1300-1500 °. Method of…