- 23.14 — Manufacture of glass fibers
- 28.99 — Manufacture of machinery and equipment for special purposes, n.v.d.g.
- 27.12 — Manufacture of electricity distribution and control apparatus
- 71.12 — Activities in the field of engineering, geology and geodesy, provision of technical advice in these areas
- 72.19 — Research and experimental development in other natural sciences and engineering
- 33.12 — Repair and maintenance of machinery and equipment for industrial use
- 33.20 — Mounting and installation of machinery and equipment
Manufacture of glass fibers