BIG 3

ATMOSPHERIC GASES-NAMELY, COMPRESSED AIR; U.S.P. OXYGEN; OXYGEN; WATER PUMPED, OIL PUMPED AND PRE-PURIFIED NITROGEN; ARGON; LIQUID OXYGEN; LIQUID NITROGEN AND LIQUID ARGON; HYDROGEN; HELIUM; CARBON MONOXIDE; CARBON DIOXIDE; CYCLOPROPANE; METHANE; ETHYLENE; PROPANE AND VARIOUS OTHER LABORATORY GAS MIXTURES MADE BY COMBINING THE FOREGOING GASES

OIL FIELD EQUIPMENT-NAMELY, FIELD FISHING TOOLS; SPECIALTY TOOLS USED TO SERVICE OIL WELLS; POWER ROTATING EQUIPMENT; GRINDING EQUIPMENT; SANDBLASTING EQUIPMENT USED TO REMOVE RUST, PAINT AND OTHER FOREIGN MATTER FROM THE EXTERIOR OF PIPELINES; GENERAL PURPOSE SANDBLASTING EQUIPMMENT

OIL FIELD EQUIPMENT AND WELDING SUPPLIES IN THE NATURE OF MEASURING AND SCENTIFIC APPLIANCES AND CONSISTING OF GAUGES AND REGULATORS (USED TO MEASURE THE FLOW OF GAS THROUGH PIPELINES, TO INDICATE PRESSURE OF GAS IN PIPELINES AND TO MIX GASES IN MEASURED AMOUNTS) AND HELMETS, WITH VISORS AND/OR EYE SHIELDS (USED FOR WELDING PURPOSES)

WELDING EQUIPMENT AND SUPPLIES-NAMELY, AUTOMATIC PIPELINE WELDERS; ELECTRIC, GAS AND DIESEL DRIVEN WELDING MACHINES; WELDING RODS; WELDING HEADS; ELECTRODES; ELECTRIC WELDING CABLE; GAS WELDING CABLE; CUTTING TORCHES; CUTTING TIPS; FLUXES; IGNITORS AND WELDING PIPE CLAMPS

ARTICLES OF CLOTHING-NAMELY, HELMETS WITHOUT VISORS OR EYE SHIELDS, CAPS AND WELDING GLOVES