42 Design services, namely, design for others in the field of fuel cells and electrolysers; technical design and planning of power plants; technological advisory services relating to the use of hydrogen; technological advisory services in the field of the use of hydrogen and oxygen alternative fuel and energy sources; research, design, development and technical inspection relating to industrial installations and machines for the electrochemical industry, the chloralkali industry and used in the production of chlorine, soda lye or potassium hydroxide; construction planning and technical planning of chemical installations; construction planning and technical planning of alkaline water electrolysis installations for hydrogen production; scientific and technological services, in particular engineering and industrial design, in particular technical consultancy and planning for the construction, expansion or dismantling and operation of chemical installations or parts of chemical installations, in particular of chemical installations for the production of synthesis gas, scientific and technological research services, namely, engineering and industrial design services, predominantly technological consultancy and planning for constructing, expanding or dismantling, and operation, of chemical installations or parts for chemical installations, in particular chemical installations for producing synthesis gas; research and development in the field of chemistry and technology, in particular relating to chemical production processes and chemical installations connected therewith or parts thereof; engineering relating to data processing; engineering, in particular, engineering consultancy services, relating to design, planning, supervision of assembly, exploiting, managing, inspection, servicing, restoration services, conversion, add-ons, dismantling, relating to the following sectors: chemical installations, industrial plants; engineering, namely, engineering services relating, to technical, regulatory approval planning and preparation of environmental surveys