44 EQUIPMENT USED FOR THE ADMINISTRATION OF ANESTHETIC, RESUSCITATION AND THERAPEUTIC GASES-NAMELY, REGULATORS, CYLINDER BASES, CYLINDER TRUCKS, WRENCHES, ADAPTERS, PORTABLE CYLINDER STANDS, FLOW-METERS, AUDIBLE WARNING SIGNALS, AND HUMIDIFYING CONTAINERS INTERPOSED BETWEEN THE FITTINGS WHICH TRANSFER THE GAS FROM THE RESERVOIR OR BOTTLE TO THE POINT OF ADMINISTRATION