2. Do not use your mouth to blow the filings, and do not remove the filings with your hands. When the file is blocked, use a wire brush to remove the filing debris along the direction of the file pattern;
3. For the hard skin or sticky sand on the castings, flash or burrs on the forgings, etc., first use a grinding wheel to grind away, and then file the chips;
3. For the hard skin or sticky sand on the castings, flash or burrs on the forgings, etc., first use a grinding wheel to grind away, and then file the chips;
4. Do not touch the filed surface with your hands when filing scraps, because your hands are greasy and slip when filing again;
5. The file cannot be used as a sled or knocked on the workpiece to prevent the file from breaking and hurting people;
6. When placing the file, do not expose it to the work surface to prevent the file from falling and hurt your feet; also, you cannot stack the file with the file or the file with the measuring tool.
