Description: [ Pressure indicator plugs for valves; control valves for regulating the flow of gases and liquids, not being parts of machines; automatic regulator and reducing valves for the regulation and control of the passage of the flow of gases and liquids through flaps placed on the plug, not being parts of machines; sight glasses control valves being inspection hole valves allowing the control of gases or liquids through a porthole of the passage of the flow, not being parts of machines; automatic valves, not being parts of machines ]; Manually operated plug valves of metal, other than parts of machines; [ manually operated ball valves of metal, other than parts of machines; ] manually operated metal valves, other than parts of machines; [ manually operated water-pipe valves of metal; metallic drain traps and ] manually operated valves of metal; manually operated valves of metal [, metal pulleys and springs, other than parts of machines; manually operated metal tank bottom valves being valves for draining in particular the bottoms of tanks; manually operated primarily metal sleeve valves being plug valves with a polytetrafouroethylene sleeve to prevent the friction between metals ]
