ELECTRON DEPOSITION EQUIPMENT; NAMELY, ELECTRON-BEAM HEATED EVAPORATORS AND COATERS; AND SPUTTER COATERS; INSULATED ELECTRIC WIRE; WELDING WIRE FEEDERS AND DISPENSERS; ELECTRODES FOR ELECTRIC ARC WELDING; ELECTRODE HOLDERS; ELECTRICAL CONNECTIONS ADAPTORS AND CONTACTS; ELECTRIC AND ELECTRONIC CONTROLLERS AND ALARMS; HELMETS, FACE MASKS, CLOTHING, BOOTS AND SHOES FOR PROTECTION AGAINST ACCIDENT OR INJURY; SAFETY SPECTACLES AND SAFETY GOGGLES, WELDERS AND OBSERVERS SCREENS AND LENSES THEREFOR; FIRE EXTINGUISHERS; AUTOMATICALLY OPERATED VALVES; PRESSURE GAUGES; PRESSURE REGULATORS; FLOWMETERS; GAS AND LEAK DETECTORS; IONIZATION GAUGES; VACUUM GAUGES; SPECTROMETERS; COMPUTERS AND DATA PROCESSORS; COMPUTER PROGRAMS FOR USE IN RESCUE OPERATIONS AND LIFE SUPPORT; MAGNETIC SOUND TAPES AND MAGNETIC DISKS, MAGNETS