42 chemical analysis; chemical engineering; engineering; advisory services relating to science; research, development, analysis and consultancy services in the field of engineering; engineering consultancy services; chemistry consultancy; technical testing and quality control services; engineering and technical support services in the design and configuration of hardware and software systems for use in the processing of water supply systems; technological services and research and design relating thereto; technological advisory services; technical design and planning of pipelines for gas, water and waste water