| Client name | City | Country |
|---|---|---|
| Rohrplan Ing.-Büro für Anlagen- | Schwedt | Germany |
| Roland Kühne GmbH | Köln | Germany |
| Rösberg Engineering GmbH | Ludwigshafen | Germany |
| Rösberg Engineering GmbH | Karlsruhe | Germany |
| RTI Automation GmbH | Leipzig | Germany |
| RUHR OEL GmbH | Gelsenkirchen | Germany |
| Ruhrkohle Bergbau AG | Gelsenkirchen | Germany |
| Ruhrkohle Bergbau AG | Dortmund | Germany |
| Ruhrkohle Niederrhein | Dortmund | Germany |
| Ruhrkohle Niederrhein AG | Duisburg | Germany |
| Rütgers Chemicals GmbH | Castrop-Rauxel | Germany |
| RWE Generation SE | Lingen | Germany |
| RWE Group Business Services GmbH | Dortmund | Germany |
| RWE Group Business Services GmbH | Köln | Germany |
| RWE IT GmbH | Essen | Germany |
| RWE Power | Bergheim | Germany |
| RWE Power AG | Köln | Germany |
| RWE Power AG | Grevenbroich-Neurath | Germany |
| RWE Power AG | Hürth | Germany |
| RWE Power AG | Frechen | Germany |
| RWE Service GmbH | Trier | Germany |
| RWE Technology GmbH | Essen | Germany |
| RWE-DEA Aktiengesellschaft | Brunsbüttel | Germany |
| S.K.I. Schlegel & Kremer Industrieautomation GmbH | Mönchengladbach | Germany |
| Saarstahl AG | Völklingen | Germany |
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