| Share | Phrase |
|---|
| 26.36% | enhancing [effectiveness] efficiency |
| 15.76% | enhancing [effectiveness] vaporization |
| 13.50% | enhancing [effectiveness] compound |
| 8.85% | enhancing [effectiveness] safety |
| 7.88% | enhancing [effectiveness] amine |
| 7.10% | enhancing [effectiveness] performance |
| 6.72% | enhancing [effectiveness] combustion |
| 6.03% | enhancing [effectiveness] mixing |
| 5.56% | enhancing [effectiveness] ignition |
| 2.20% | still [temporal] enhancing |