... 450(MV)Working Method:1. Tool: electric flat vibrating tamper, laminated board, woven plastic cloth, square batten, carbstick, lath.2.Constrution ... as the first layer, strickle the surface, then put laminated boards all over the surface. Then make the material flat ... and compacted with the electric flat vibrating tamper. Remove the Laminated boards, the woven plastic cloth and inspect the surface. ...