| Client name | City | Country |
|---|---|---|
| Reineke Meß- und Regeltechnik GmbH | Bochum | Germany |
| RELIANCE CORPORATE IT PARK LIMITED | Navi Mumbai | India |
| Reliance Industries Limited | Patalganga | India |
| REMBE® GmbH Safety + Control | Brilon | Germany |
| RENCO Spa | Pesaro | Italy |
| Rheinisch-Westfälische Technische | Aachen | Germany |
| RHODIA OPERATIONS S.A.S. | Saint Fons | France |
| Rhône Energies SARL | GENÈVE | Switzerland |
| Richards Industries, Inc. | Cincinatti | United States |
| Ringo Válvulas, S.L.L. | Zaragoza | Spain |
| RKB Raffinerie-Kraftwerks-Betriebs GmbH | Leuna | Germany |
| RMG Messtechnik GmbH | Butzbach | Germany |
| Robo Wasseraufbereitungs AG | Bottenwil | Switzerland |
| Roche Vitamines Ltd | Basel | Switzerland |
| Rock International Engineering Consultancy | Al Khuwair, Muscat | Oman |
| Rockfin Sp. z o.o. | Zukowo | Poland |
| Röhm GmbH | Darmstadt | Germany |
| Rohöl-Aufsuchungs AG | Wien | Austria |
| Rohrplan Ing.-Büro für Anlagen- | Schwedt | Germany |
| Roland Kühne GmbH | Köln | Germany |
| Rösberg Engineering GmbH | Karlsruhe | Germany |
| Rösberg Engineering GmbH | Ludwigshafen | Germany |
| Rotork Natal Ltd. | Mayville / South Africa | South Africa |
| RR Ing. Gerold Winkler | Wien | Austria |
| RTI Automation GmbH | Leipzig | Germany |
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