1. Alstom SA
2. Andritz AG
3. Calgon Carbon Corporation
4. Daikin Industries
Ltd.
5. Donaldson Company Inc.
6. Ducon
7. D?rr AG
8. ELEX AG
9. Esco International
10. Fujian Longking Co. Ltd.
11. GEA Group
12. General Electric Company
13. Hamon
14. Horiba
Ltd.
15. John Wood Group PLC
16. Mann+Hummel
17. Mitsubishi Power
Ltd.
18. Pure Air Solutions
19. Siemens AG
20. Thermax Limited
21. Tri-Mer Corporation