Here are the core activities of the companies:
1. Gebr. Scheiwiller AG: Window construction, carpentry, and kitchen manufacturing
2. Egloff AG Bauunternehmung: Construction company, building materials, and construction services
3. A+B Bürsten-Technik AG: Development of customized brush systems
4. B. Leutenegger AG: Transportation of dry materials and winter maintenance services
5. (No core activity determinable, as it is a regional page)
6. (No core activity determinable, as it is an article about a company, but does not contain clear information about the core activity)
7. (No core activity determinable, as it is a regional page)
8. (No core activity determinable, as it is a regional page)
9. Alex Neher AG: Metal goods and tool manufacturing
10. (No core activity determinable, as it is a regional page)