NATIONAL

EQUIPMENT AND APPARATUS USED IN THE HANDLING AND ADMINISTERING OF MEDICINAL GASES-NAMELY, HUMIDIFIERS FOR OXYGEN AND OTHER GASES, THERAPY GAS REGULATORS, INSPIRATORY VALVES, BREATHING HOODS, INSPIRATORY UNITS (COMPRISING A SELF-CONTAINED ASSEMBLY INCLUDING THE GAS TANK, REGULATOR, GAUGES, CONDUITS, AND BREATHING HOODS); ALCOHOL BLOWPIPES AND TORCHES FOR DENTAL PLATE WORK; AND ORTHODONTIC BLOWPIPES; AND PARTS THEREFOR