42 Conducting technical feasibility studies for the construction and operation of any equipment and apparatus in the field of hydraulics, namely, irrigation systems, hydraulic systems, pipelines, plumbing, stations for pumping, treatment and purification of liquids, namely, waste water, rainwater, drinking water, systems for decanting these liquids, water supply systems; engineering services for construction of water treatment, conveyance and distribution facilities; advisory services with respect to designing and drafting construction plans, in the field of water treatment, conveyance and distribution installations; scientific laboratory services in the field of water treatment, conveyance and distribution; scientific and technological services, namely, research and design services with respect to urban planning and development works in the field of water treatment, conveyance and distribution facilities; water analysis; geographic mapping services in the field of water treatment, conveyance and distribution facilities; design of computer systems in the field of water treatment, conveyance and distribution facilities; providing advice with respect to energy saving in the field of water treatment, conveyance and distribution facilities; quality control in the field of water treatment, conveyance and distribution facilities; development, namely, design, installation, maintenance, and update of software in the field of water treatment, conveyance and distribution; rental of water filtration machine operating software in the field of water treatment; software as a service (SaaS) featuring software for operating water filtration machines in the field of water treatment, conveyance and distribution; construction drafting in the field of water treatment, conveyance and distribution facilities; research and development of new products for others in the field of water treatment, conveyance and distribution facilities; bacteriological and chemical research in the field of water treatment, conveyance and distribution; Scientific environmental protection research in the field of water treatment, conveyance and distribution; conducting technical feasibility studies and engineering works connected with research of drinking water supply sources