Specialized Freight (except Used Goods) Trucking Ventilation Regulation and Administration of Communications Plumbing Regulation and Administration of Communications Plumbing General Freight Trucking Ventilation

Gases Heating works Electricity, heating, solar and nuclear energy Other services Electricity Heating, ventilation and air-conditioning installation work

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Europe Southern Europe Western Europe

Environment and Pollution-Recycling Automobiles and Auto Parts Supply Energy Postal and Courier Services Roads and Highways-Bridge Oil and Gas Water and Sanitation Environmental Work Printing and Publishing Services Railways-Rail-Railroad Defence and Security Electricity Construction Energy-Power and Electrical Computer Hardwares and Consumables Laboratory Equipment and Services Marine