1.tyre oil extraction machine 2.High efficiency, easy maintenance, simple operation 4.Completed safety ... %×2200RMB=2,860RMB4Gross Profit24,930RMB5Daily Net Profit24,930RMB-15,920RMB=9,010RMB6Monthly Net Profit9,010RMB×25=225,250RMB7Yearly Net Profit225,250RMB×10=2 ...