| Client name | City | Country |
|---|---|---|
| LMR-Technik GmbH | Weil am Rhein | Germany |
| Lonza AG | Visp | Switzerland |
| Lonza Solutions AG | Visp | Switzerland |
| Lotte Chemical Louisiana LLC | Houston | United States |
| Ludan Engineering Co. Ltd | Tel-Aviv | Israel |
| Ludan Engineering N.V. | Berchem | Belgium |
| Lummus Novolen Technology GmbH | Mannheim | Germany |
| Lummus Technology Heat Transfer B.V. | Gurgaon | India |
| LUPATECH S/A - MNA NOVA ODESSA | Jacareí | Brazil |
| LURGI Chemieanlagenbau Chemnitz GmbH | Chemnitz | Germany |
| Lurgi Entsorgung GmbH | Ratingen | Germany |
| Lurgi Lentjes | Essen | Germany |
| Lurgi Metallurgi GmbH | Frankfurt | Germany |
| Lyondell Chemicals Netherlands BV | Maasvlakte Rt. | Netherlands |
| Lyondell Chemie Nederland B.V. | Rotterdam | Netherlands |
| LyondellBasell | Houston | United States |
| Lyondellbasell | Houston | United States |
| M+W Central Europe GmbH | Schwedt/Oder | Germany |
| M-REAL SCHWEIZ AG | Biberist | Switzerland |
| m-tech gmbh | Forchtenberg | Germany |
| M. N. Dastur & Company (P) Ltd. | Kolkata | India |
| Magdeburger Industriearmatur-Manufaktur GmbH | Magdeburg | Germany |
| MAGWEN Valves GmbH | Osterweddingen | Germany |
| Mahler AGS GmbH | Stuttgart | Germany |
| MAKE IT GmbH | Chemnitz | Germany |
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