5-1-1.Before production, cleaning the platform of machine ,adding the reminder of protecting part appearance in the process documents.5-1-2.Increasing the deepth of turnover box,it should be deeper than the part's height." 5-1-2.Increasing the deepth of turnover box,it should be deeper than the part's height "5-2-1.When OQA checking, operator should tear off all the resist films of two sides ,then do 100% checking appearance.5-2-2 After packing the parts,put them into foam box with foam separating them."