International Standard Classification of Occupations:
7 Craft and Related Trades Workers71 Building and Related Trades Workers (excluding Electricians)712 Building Finishers and Related Trades Workers7127 Air Conditioning and Refrigeration Mechanics
ISCED Fields of Education and Training (ISCED-F 2013):
07 Engineering, manufacturing and construction071 Engineering and engineering trades0713 Electricity and energy
Statistical Classification of Economic Activities in the European Community (NACE):
C MANUFACTURING33 Repair and installation of machinery and equipment