Fluid storage tanks in the nature of settling tanks and sludge putrefaction pits, pool covers in the nature of fluid storage tank covers, pipes, water-pipe valves of cast steel, water-pipe valves of steel; overflows in the nature of water treatment equipment, namely, metal water storage basins for collecting and storing water; water-pipe non-return valves, gratings, duckboards, sand separation pits in the nature of storage containers for sand, distribution devices in the nature of pipes, fixed scraper bridges, frames and plates for filter presses, silos for filter press cakes; all the aforesaid goods for completing installations for storage and treatment, namely, purification, preparation, disinfection, ventilation, iron removal, phosphorus removal, denitrification, decarbonization, and irradiation and for transport and disposal of water, detritus, sludge and filter press cakes; construction elements for drainage of rain water and gray water, namely, drains and siphons in the nature of drain pipes for roofs, cellars, balconies, wash-up rooms, floors, paths, hangars, roads and bridges; drainage grates, gutters, [ manhole covers, ] manholes in the nature of access shafts, well ladder rungs, gutter covers, channels and large floor outlets in the nature of fittings and catch basins for attachment to sewer pipes to trap debris, water-pipe valves, cleaning valves not being parts of machines, manually operated check valves, water-pipe valves for protection against the water back-flow, manually operated flushing valves, flushing traps in the nature of drain traps, drain pipes, plates for shafts and gullies; all the aforesaid goods made entirely or primarily of metal [ ; metal safety seals against hydrocarbon leaks in pipe lines ]

Machines and component parts thereof for storage, treatment in the nature of purification, preparation, disinfection, ventilation, iron removal, phosphorus removal, denitrification, decarbonization, and irradiation, and for transport and disposal of water, detritus, sludge and filter press cakes, in particular valves, weirs, sand sifters, sand washers, sieves, sifters, raking machines, rotating and mobile scraper bridges, surface aerators, aeration rotors, aeration turbines, submersible aerators, slow-running mixers, high-speed mixers, mixing screws, propellers for blending, mixing bridges, surface scrapers, scrapers, sand scrapers, rotary distributors, sludge thickeners, mud conveyors, scraper conveyors, trough wheels, waste water pumps, slurry pumps, waste crushing machines, presses for waste, filter presses, frames and plates for filter presses, apparatus for circulation and mixing, for introducing gases, for vaporization thereof and spinning of surface layers for treating digested slurry; [ filter press cake conveyors; ] mechanical apparatus for drainage of rain water and gray water, namely, hydrocarbon separators, decantable material separators, valves being parts of machines, flushing valves being parts of machines, vacuum pumps for use in cellars; machines and apparatus for use in the manufacture of concrete building materials, namely, mixing machines with integrated metering devices, machines for the manufacture of cement blocks, and transport and packaging machines, machine parts in the nature of molds, complete manufacturing vibrators, foundry machines and their components, namely, compression and injection molding machines, molds, core forming machines, [ centrifuges for sand, ] unmolding machines, apparatus for preparing sand in the nature of sand cleaning and mixing and screening machines, hydraulic control units

[ Electric switches, electric relays, electric program switches, time-delay switches, programming devices in the nature of programmable logic controller, electrical distribution boxes; control centers in the nature of electrical integrated control systems in the field of waste water treatment; electric control panels; apparatus for measuring, monitoring and analysis and laboratories, in particular for water preparation and effluent treatment, namely, scientific apparatus for use with membrane filtration in the nature of water filter controllers and computer software for detecting and measuring water quality; apparatus for measuring, signaling, checking in the nature of supervision, display and processing of data, namely, data processors; installations made of the aforesaid apparatus for monitoring and controlling operations, especially for installations for treating sewage, namely, electronic controllers for sewage pumps; electromechanical equipment for use in the manufacture of concrete building materials, in particular, metering and control devices in the nature of electrically operated valves and electrically operated gates and orifice plates for metering and controlling the flow rate of liquids; electric remote control equipment for the foundry industry, namely, electrical installations for the remote control of industrial operations ]

Apparatus and their parts for storage and treatment in the nature of purification, preparation, disinfection, ventilation, iron removal, phosphorus removal, denitrification, decarbonization, and irradiation and for transport and disposal of water, detritus, sludge or filter press cakes, in particular, water control valves for faucets, water control metered valves for water supply pipes, weirs in the nature of skimmer flow diverting weir for increasing the amount of debris drawn into the skimmer, water filters in the nature of sand classifier filters and sifter filters, devices for digesters, namely, waste water purification units; installations for clarification in the nature of decanting, namely, sewage purification installations; incineration and combustion apparatus for waste or sludge, namely, incinerators; [ bacterial beds and filler materials therefor in the nature of a biological contactor for treatment of sewage and drainage water; ] bathtubs, sinks, built-in washbasins, washstands, longitudinal and circular collective washbasins [, bidets ] ; all the aforesaid goods made entirely or partly of metals, stoneware and plastic material; heating boilers and drying apparatus for use in the manufacture of cement blocks in the nature of industrial apparatus using air for drying cement blocks; installations for aspiration and purification of air and gases composed primarily of fans, filters and separators

Liquid storage tanks in the nature of settling tanks and putrefaction pits, [ fitted pool covers for liquid storage tanks in the nature of settling tanks and putrefaction pits, ] ducts, rigid pipes for building, overflows in the nature of water treatment equipment, namely, water storage basins for collecting and storing water, non-return water pipe valves, gratings, duckboards, sand separation pits in the nature of storage tanks for sand, distribution devices in the nature of pipes, fixed scraper bridges, silos for filter press cakes; all the aforesaid goods for completing installations for storage and treatment in the nature of purification, preparation, disinfection, ventilation, iron removal, phosphorus removal, denitrification, decarbonization, and irradiation as well as for transport and distribution of water, detritus, sludge and filter press cakes; all the aforesaid goods made entirely or primarily of concrete; construction elements for drainage of rain water and gray water, namely, drains and siphons in the nature of concrete drain pipes of roofs, cellars, balconies, wash-up rooms, floors, paths, hangars, roads and bridges; [ non-metal drainage grates, ] non-metal gutters, non-metal manhole covers; nonmetal manholes in the nature of access shafts; non-metal gutter covers; channels and large floor outlets in the nature of non-metal catch basins for attachment to sewer pipes to trap debris

[ Non-metal well ladder rungs; safety seals against hydrocarbon leaks in pipe lines in the nature of non-metal pipe clips ]

Construction and repair work, namely, building of structures in the field of water and sewage treatment; construction of turnkey installations in the nature of plants in civil engineering in the field of water and sewage treatment

Construction projects, particularly with respect to organization, namely, construction drafting; engineering services, especially economic projects in the field of dehydration, water supply, preparation of water and treatment of sewage water; construction drafting in the nature of preparation of construction projects and plans from a technical point of view; engineering services and architectural services in the field of construction, especially projects relating to water, treatment installations, networks for distribution and sewerage, water preparation installations, water, air and gas treatment installations, sludge, urban waste and trash treatment installations; engineering services, particularly for static calculations, plan drafting, technical projects in the field of dehydration, preparation and distribution of water, as well as in the field of treatment of waste water; scientific and technological services, namely, providing scientific research, measurement and analysis in the field of pollution; scientific research in the nature of developing research and expert reports in the field of pollution; [ testing of materials; ] monitoring of pollution in water, gas and air for scientific research purposes; monitoring of water tanks of others for quality control purposes; monitoring of water treatment and sewage treatment plants of others for quality control purposes [ ; operation of clarification pilot installations for others, namely, development of water purification installations and sewage treatment plants for others ]