| Share | Phrase |
|---|
| 42.81% | expanding [increase] gas |
| 8.36% | expanding [increase] chamber |
| 7.82% | expanding [increase] bag |
| 7.41% | expanding [increase] combustion |
| 6.04% | expanding [increase] direction |
| 5.67% | expanding [increase] force |
| 4.98% | expanding [increase] burning |
| 4.98% | expanding [increase] lock |
| 4.32% | expanding [increase] brake |
| 4.32% | expanding [increase] stream |
| 3.24% | expanding [increase] means |