| Client name | City | Country |
|---|---|---|
| MODEC GHANA LIMITED | Accra | Ghana |
| MODEC International, Inc. | Houston | United States |
| Modulare Planungs- und Konstruktionstechnik GmbH | Köln | Germany |
| Mokveld Valves B.V. | Gouda | Netherlands |
| Montell Italia SpA | Ferrara | Italy |
| Moore Industries-International, Inc. | North Hills | United States |
| mopran GmbH | Butzbach | Germany |
| Moritz J. Weig GmbH & Co. KG | Mayen | Germany |
| Mott MacDonald & Company LLC. | Ruwi, Muscat | Oman |
| MRC Global Norway AS | Hokksund | Norway |
| Mt.H Control Valves Co. LTD. | Busan | Republic of Korea |
| MTS VALVES AND TECHNOLOGY, S.L.U. | Arrankudiaga Vizcaya | Spain |
| müller co-ax ag | Forchtenberg | Germany |
| müller quadax gmbh | Forchtenberg | Germany |
| Multitex Filtration Engineers Limited | NEW DELHI | India |
| MVV Enamic IGS Gersthofen | Gersthofen | Germany |
| N+S GmbH & Co. KG | Gelsenkirchen | Germany |
| N.V. Nederlandse Gasunie | Groningen | Netherlands |
| Nan Hang Instruments Inc. | Beijing | China |
| Naphtachimie SA | Lavera | France |
| National Industrial Gases Company (GAS) | Jubail | Saudi Arabia |
| National iranian south oil company | Ahvaz | |
| National Research Council | Pisa | Italy |
| National Takanah Company Ltd. | Al Jubail | Saudi Arabia |
| Neckarwerke Stuttgart AG | Stuttgart | Germany |
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