[Class : 7] Valves; Safety Valves [Parts Of Machines]; Back Pressure Valves As Parts Of Machines; Pressure Reducers [Parts Of Machines]; Valves Operated By Changes In Pressure; Pressure Valves [Parts Of Machines]; Ball Valves Being Parts Of Machines; Actuators For Mechanisms; Actuators For Valves; Actuators Incorporating A Gear Mechanism For Pipeline Valves; Angle Valves Bei...