1. producing strip used as refrigerator door-seal 2. automatic, extruding, magnetizing and rolling Major ... frequency converter1.5KW1SET16.rolling deviceDisc tension control1SET Major Dispositon:Magnetic requirements Visual surface of the flat, smooth, no ... powder in about 90%, rubber 10%, 3% plasticizer Magnetic properties Surface of the magnetic flux density (GS)≥ 680Hardness SHA95 ± 5Density g ...