PORTABLE AND STATIONARY MAGNETO-ELECTRIC AND PENETRANT CRACK AND WELD TESTERS AND INSPECTORS AND PARTS THEREFOR, DEMAGNETIZING UNITS FOR DEMAGNETIZING METAL OBJECTS FOR INSPECTION AND TESTING AND PARTS THEREFOR, ULTRAVIOLET INSTALLATIONS AND LAMPS FOR CRACK AND WELD TESTING AND INSPECTION AND PARTS THEREFOR, AND MAGNETIC INTENSITY MEASURING INSTRUMENTS