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Wayss & Freytag Ingenieurbau AG is active worldwide in the field of tunnelling. On the international market, the company carries out projects in which it distinguishes itself by its special know-how and excellent performance. The scope of our activities ranges from mechanized and conventional tunnelling, the construction of sewage treatment plants and power plants, railway, bridge and stadium construction and industrial construction to environmental technology. Engineering consulting, location analyses, utilization concepts and feasibility studies complete our range of services.


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