... materialsBoard, solid board, composite floor, plywood, blockboard etc. Model SRP1300-2 is mainly suitable for calibrating, sanding and ... solidboard, plywood,blockboard, composite floor etc. Model SRP1300-3 is mainly used to calibrate the basic materail of multi-layer ... to control motors running, sanding belt swing and thickness display,Which guarantees the anti-jamming function of the machine. Model ...