a seam may be thicker

processing of grain up to about 4 times the largest particles, while the fine grade material thickness is up to 10 particles.feedstock magnetic material Magnetic plates content is not high, given the seam should be thinner. If too thick, then the magnetic particles in the lower pressure by the upper material, not magnetically，It caused lower recovery.the high content of pipeline magnet the magnetic particles, a seam may be thicker.