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How to draw hand-drawn c2 in engineering system
1. Draw two intersecting straight lines on the drawing, representing the edges and corners of the parts respectively.

2. Draw an isosceles right triangle at the intersection of these two lines. The base of this triangle intersects with two straight lines, and its height is equal to the edges and corners.

3. Mark C2 above the triangle, indicating that it is a 45-degree chamfer, with 2mm cut off at both sides. This completes the hand-drawn representation of C2 chamfer.