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How to realize rounding in machining. For example, a square marble column with a side length of 20cm and a round edge is not drawn, but processed.
In general, after the marble square column is cut,

Plastic with plastic tools.

This kind of cutter is shown in the following figure.

Both sides are shaped arc blades.

According to the fillet you need, use as large an arc cutter as possible.

The tool material is of course a diamond grinding wheel.

After the cutter moves straight forward, it forms an arc angle.