... combustion system .the reactor will slowly heat ,when the temperature reach around 250 degree celsius,it will produce oil gas ... ,carbon black will be discharged automatically.Lastly,when the temperature fall to 100 degree celsius,worker could opened the door of ... NO.ItemIncome1Crude Oil10T×45%×4,500RMB=20,250RMB2Carbon Black10T×35%×520RMB=1,820RMB3Steel Wire10T×13%×2200RMB=2,860RMB4Gross Profit24, ...