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Jona Jona is hosting seven of the largest companies in Switzerland (Schweiz). According to the NACE-activities of the biggest companies, Jona is the city of the NACE-Code: "DI: MANUFACTURE OF OTHER NON-METALLIC MINERAL PRODUCTS"
City:	Jona (See Map below)
Country:	Switzerland (Schweiz)
Largest companies:	Geberit International AG Holderbank Management und Beratung AG Geberit Produktions AG Geberit-Gruppe Kundert AG
City Id:	990

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