7
Hydrogen dispensing pumps for service stations; Current generators; Power generators for vehicles; Portable electric power generators; Uninterruptible power supplies [machines] for the generation of electrical energy; Generators; Gas operated power generators; Aerators; Machines for generating gas by electrolysis
9
Converters, electric; Energy regulators; Regulating apparatus, electric; Electric control apparatus; Electrolysis apparatus for laboratory use; Membranes for filtration [scientific]; Diaphragms for scientific apparatus; Measuring devices, electric; Accumulators, electric; Gasifiers for laboratory use; Electric power analyzers; Energy control devices; Apparatus and instruments for accumulating electricity; Apparatus and instruments for regulating electricity; Apparatus and instruments for transforming electricity; Apparatus for monitoring electrical energy consumption; Electricity storage apparatus; Electronic control systems
42
Research and development of new products for others; Industrial research; Research services; Energy auditing; Consultancy in the field of energy-saving; Engineering services in the field of energy technology; Research in the field of hydrogen fuel cells; Scientific research in the field of electricity; Scientific research in the field of energy; Consultancy relating to technological services in the field of power and energy supply; Engineering services in the field of electrical power and natural gas production