11 PRESSURE REDUCING DEVICE, NAMELY, PRESSURE REGULATORS, DEVICE FOR EXPANSION FOR COMPRESSED GASES, NAMELY, REGULATORS, AND DEVICE FOR REDUCTION OF HIGH GAS PRESSURE VALUES TO LOWER ONES, NAMELY, REGULATORS; BATTERY PRESSURE REDUCING DEVICE, NAMELY, PRESSURE REGULATOR MANIFOLD AND GAS SUPPLY PANEL WITH TWO OR MORE CONNECTIONS TO GAS STOCK; STATION PRESSURE REDUCING DEVICES, NAMELY, SINGLE CYLINDER PRESSURE REGULATOR AND GAS SUPPLY PANEL WITH ONE CONNECTION TO GAS STOCK; DISPENSING PRESSURE REDUCING DEVICES, NAMELY, POINT-OF-USE PRESSURE REGULATORS AND PRESSURE REGULATORS WHICH ARE USED AT THE POINT OF USE; LINE PRESSURE REDUCING DEVICES, NAMELY, LINE PRESSURE REGULATORS AND PRESSURE REGULATORS WHICH ARE USED WITHIN TUBE LINES FOR CENTRAL GAS SUPPLY SYSTEMS; BOTTLE PRESSURE REDUCING DEVICES, NAMELY, CYLINDER PRESSURE REGULATORS AND REGULATORS CONNECTED TO THE GAS CYLINDER OUTLET; TABLEAU PRESSURE REDUCING DEVICES, NAMELY, WALL, PANEL OR COUNTER TOP MOUNTED PRESSURE REGULATORS AND PRESSURE REGULATORS MOUNTED ON PANELS WHICH CAN BE MOUNTED ELSEWHERE; GAS SUPPLY SYSTEM CONSOLES, NAMELY, PANELS FOR MOUNTING GAS PRESSURE REDUCING AND REGULATING DEVICE; FILTERS, NAMELY, GAS PURIFICATION PARTICLE FILTERS; BACK PRESSURE VALVES WITH BUILT IN FILTERS, NAMELY, NON-RETURN VALVES WITH GAS PURIFICATION FILTER INTEGRATED; GAS PURIFYING ARMATURES, NAMELY, DOUBLE AND THREE-WAY VALVES, DUAL, TRIPLE OR MULTIPLE PORT VALVE BLOCKS, HOUSING INTEGRATED MULTIPLE VALVE COMBINATIONS, AND PARTS THEREFORE; GAS DISTRIBUTION INSTALLATIONS SUBSTANTIALLY CONSISTING OF THE AFORE-NAMED GOODS; GAS DISTRIBUTION SYSTEMS SUBSTANTIALLY CONSISTING OF AIR PURIFIERS AND GAS REGULATORS