Material of screed plate: For the material, we use the steel board of HARDOX(Sweden) or DILLIDUR(German), the life of this import steel board is 4 or 5 times than the domestic steel board. Working process of screed plate: Kaito adopts NC plasma cutting under the water co that it can ensure mechanical property of the steel board, Kaito milles the screen edge by using precision nc lathe to guarantee precise requirement of mounting size of screen.