A graphical representation of the joints caused by the air cavity material (left) and carbon particles on a surface that is caused by the air cavity caused by the seam of the raw material (right)
The picture shows the cavitation caused by the seam of raw materials (left) and the soot on the surface caused by cavitation caused by the seam of raw material (right).
The picture shows the sinus arising from the junction of raw materials (left) and the soot on the workpiece surface caused by sinus caused by the joints of the raw materials. (right) .