Questione giuridica chiave
Whether the contracts were to be qualified as work contracts rather than mixed sale/work contracts
Decisione estratta
The lower court's qualification as work contracts stood; the appellant's factual challenge was inadmissible because it had not been properly exhausted before the cantonal cassation court.
Motivazione estratta
The appellant did not show that it had raised the factual objection under cantonal law. In any event, it merely asserted an alternative reading of the offers without demonstrating arbitrariness.