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Compressors, blowers, fans and densifiers (term considered too vague by the International Bureau - Rule 13 (2) (b) of the Regulations); exhaust installations; hydrogen containers (so-called cryotanks) (term considered too vague by the International Bureau - Rule 13 (2) (b) of the Regulations).Fuel cells, fuel cell stacks, fuel cell systems, as well as parts of the aforementioned goods; computer programmes for fuel cells, fuel cell stacks and fuel cell systems; electronic current converters; electrodes for fuel cells, fuel cell stacks and full cell systems; membranes for fuel cells, fuel cell stacks and full cell systems; housings for fuel cells, fuel cell stacks and fuel cell systems; control valves for fuel cells, fuel cell stacks and fuel cell systems; check valves for fuel cells, fuel cell stacks and fuel cell systems.Assembly, installation and repair of fuel cells, fuel cell stacks, fuel cell systems, as well as of vehicles equipped with fuel cells.Research in the field of fuel cells, fuel cell stacks and fuel cell systems; technical services in relation to fuel cells, fuel cell stacks, fuel cell systems, as well as their components (term considered too vague by the International Bureau - Rule 13 (2) (b) of the Regulations); development services in relation to fuel cells, fuel cell stacks, fuel cell systems, as well as their components (term considered too vague by the International Bureau - Rule 13 (2) (b) of the Regulations).