The polished surface is a smooth grinding surface produced by grinding stones and bedrock in the glacier and between two stones.
The litchi surface is a plate formed by gently chiseling the stone surface manually or by machines, leaving potholes one by one. Knurling type rotary Bush hammer plate .It has anti-skid effect.
The burning surface is a plate formed by heating the stone surface at high temperature with a flame ejector, which causes the stone surface to expand violently and produce crushing. There are many small potholes on the surface of the burning plate, which will increase the friction of the stone and facilitate the walking of pedestrians and vehicles.
Litchi surface and fire surface are different from the following factors
1. The friction of litchi surface is greater than that of fire surface.
2. The thickness of litchi Board shall be thicker than that of fire surface.
3. The processing cost of litchi noodles will be a little more expensive than that of burning surface.
4. The surface depression of litchi surface will be more obvious and deeper than that of fire plate.
5. The processing speed of litchi surface is slow, and the processing speed of fire surface is fast.