a) During the warranty period, because of product quality problem, the DRC Machinery is responsible for free maintenance, if need to change parts, DRCMachinery be responsible for free replacement.

b) If the machine problem is not belonging to DRC Machinery's machine quality problem, when the buyer needs DRC Machinery send engineers to give repairing service, DRC Machinery charge the appropriate cost; Or, the buyer send machine with problem back to DRC Machinery, DRC Machinery is responsible for maintenance, DRC Machinery charge the appropriate cost.