Siemens AG was the main contractor , with Fiat Ferroviaria and ADtranz as subcontractors .
The prime contractor was Siemens AG with Fiat Ferroviaria and ADtranz as subcontractors .
The prime contractor was Siemens AG with Fiat Ferroviaria and ADtranz as subcontractors .
Reformula esta oración: Siemens AG was the main contractor , with Fiat Ferroviaria and ADtranz as subcontractors . Producción: