Engineers and similar technical advisors, with the exception of surveyors
Vervaardiging van andere machines en apparaten voor algemeen gebruik
Vervaardiging van machines voor de productie van voedings- en genotmiddelen
Drilling, turning, countersinking, shaving, planing, lapping, broach, dressing, sawing, grinding, sharpening, etc. of metallic pieces
Manufacture of industrial valves, including regulation valves and adduction valves
Measurements concerning clean air and water, measurement of radioactivity or similar phenomenons, analysis of the potential sources of pollution (smoke, sewage, etc.)
Production of navigation devices, measuring instruments and control instruments