[ACC] INVITATION TO TENDER FOR THE AWARDING OF THE MAINTENANCE SERVICE FOR THE REPAIR DUE TO ACCIDENTAL FAILURE OF A PIARDI TECHNOLOGIE DEL FREDDO MEDICAL/PHARMACEUTICAL REFRIGERATOR SUPPLIED TO THE CARL MARX COLLECTION PRODUCTION VALIDATION STRUCTURE OF THE SANT'ANNA PRESIDIO OF THE AOU CITY OF HEALTH AND SCIENCE OF TURIN. (EXPIRED)