The machine adopts advanced man-machine,it can be display dialogues directly.All the sanding heads are stong and reliable,they supply a stable accurate with high strength,shock absorption, free from deformation,high productive efficiency, easyand clean operation.PATENT NO FOR SR SERIES:ZL 97 2 33338 X.PATENT NO FOR APPERANCE:SPR1300:ZL200430047826.0SRA1300:ZL200430047827.5,SDC1300:ZL200430047827.5They are sold well both at home and worldwide. Payment Terms: by irrevocable L/C at sight Certification(s): DNV RVA ISO9001,High & New Technology Enterprise.Supply Ability: 40-50 sets/month.