71.209Level 571.20Technical testing and analysis71.20901Tests and analyses relating to composition, physical characteristics, performance, compliance with regulatory texts and standards or specifications of materials, products, installation, etc.71.20902Laboratory testing or analysis to verify the functioning, ageing or safety of installations and equipment71.20903Implementation of measures concerning water and air purity, radioactivity measurements and other similar phenomena, analysis of potential sources of pollution (smoke, waste water, etc.)71.20904Testing activities in the field of food hygiene71.20905Control of calculations of building elements71.20906Certification of ships, aircraft, motor vehicles, pressure containers, nuclear installations, etc.71.20907Expertise in motor vehicles