apply liquid penetrant into the welded so that the liquid penetrat into the defect with process penetrant testingpt

accessories aerosol apply architecture assembly brush closeup concept construction defect destructive equipment experience factory gloves hand industrial industry inspection inspector iron job liquid man material metal non nondestructive object orange penetrant penetrat penetration pipe process professional protection quality red repair safety skills solvent steel structure surface technical technology testing testingndt testingpt that tools weld welded welder welding work