1. Air Products And Chemicals Inc
2. Hitachi Ltd
3. Linde Plc
4. On Site Gas Systems Inc
5. Parker-Hannifin Corporation
6. Peak Gas Generation
7. Oxymat A/S
8. Novair S.A.S (Noxerior S.R.L.)
9. L’Air Liquide S.A.
10. Atlas Copco Ab