Retreading is applied to casings of spent tires that have been inspected and repaired. Masks are then inspected and later repaired using an electron beam. Backups on removable media must be carefully inspected before restoration. All ships were inspected for what goods they carried. Before the battle, Babur had carefully inspected the site. The car was fully NASCAR inspected and certified. The ride had been inspected earlier in the day and cleared for operation. Vessels at the time were not inspected, or insured. When complete, a plane is rigorously inspected to search for imperfections and defects. Storage cylinders must be regularly inspected for signs of corrosion and leaks. The vehicles are inspected before leaving. Slaughterhouses were inspected and screened incoming passengers from problem areas. KOIs are inspected more thoroughly in a process called dispositioning. Well water must be inspected for contaminants coming from the ground source. Because of the larger diameters the pipe can usually be inspected internally after welding.