1. Air Applications Inc.
2. Anguil Environmental Systems Inc.
3. Atlas Copco UK Holdings
4. Camfil AB
5. Choice Environmental Consulting Group Inc.
6. Donaldson Company Inc.
7. Durr Systems Inc.
8. FLSmidth & Co. A/S
9. Intellishare Environmental Inc.
10. KC Cottrell India Pvt. Ltd.
11. Kono Kogs Inc.
12. Nederman Holding AB
13. Parker Hannifin Corporation
14. Sumitomo Heavy Industries
Ltd.
15. Thermax Limited