COMPRA Gesellschaft f. Qualitätssicherung u. Umweltschutz mbH |
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Johannisstr. 20 50226 Frechen 02234 95710-0 |
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Ifes Institut für angewandte Energiesimulation und FacilityManagement GmbH |
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Augustinusstr. 11 C 50226 Frechen 02234 65095 |
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Opsis GmbH |
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Hauptstr. 169 50226 Frechen 02234 23097 |
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