Siemens AG was the main contractor , with Fiat Ferroviaria and ADtranz as subcontractors .
The main contractor was Siemens AG with Fiat Ferroviaria and ADtranz as subcontractor .
The main contractor was Siemens AG with Fiat Ferroviaria and ADtranz as subcontractor .
Reformular este texto: Siemens AG was the main contractor , with Fiat Ferroviaria and ADtranz as subcontractors . Producción: