7 Machines, apparatus, fittings and mechanically operated equipment, namely, hydraulic pumps or compressors, pressure and volume flow control systems for fluids, in the nature of pressure relieve valves, pressure equalizing valves, control valves, pilot valves, non-return valves, shutoff valves, overload protection valves, safety valves, regulating valves, reducing valves, throttle valves, filters for fluids, condensate separators, links, gauges, readings and storages, for the generation, processing, monitoring, treatment, transport and distribution of pressurized hydraulic fluids; Machines, apparatus, fittings and mechanically operated equipment for controlling and monitoring of pressurized hydraulic machines, namely, hydraulic pumps or compressors, pressure and volume flow control systems for fluids, in the nature of pressure relieve valves, pressure equalizing valves, control valves, pilot valves, non-return valves, shutoff valves, overload protection valves, safety valves, regulating valves, reducing valves, throttle valves, filters for fluids, condensate separators, links, gauges, readings and storages; Hydraulic power and control units, consisting of hydraulic pumps, hydraulic compressors, pressure relieve valves, pressure equalizing valves, control valves, pilot valves, non-return valves, shutoff valves, overload protection valves, safety valves, regulating valves, reducing valves, throttle valves, filters for fluids, condensate separators, links, gauges, readings and storages; Sealing rings, piston rod seals and scraper rings being part of reciprocating piston compressors or pumps