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Swiss Federal Railways (SBB) awarded CTA AG a contract worth CHF 1,584,596.30 for the supply, installation and commissioning of 155 Variable Fluid Refrigerant (VRF) systems for climate control in cross-passages of the Gotthard Base Tunnel.
“Die zu beschaffenden Leistungen betreffen die Lieferung, Montage und Inbetriebnahme von 155 Variable Fluid Refrigerant (VRF)-Systemen zur Klimatisierung der Querschläge im Gotthard Basistunnel.”archiv.simap.ch
Summarized from public sources; check the original articles before acting on it.