| Share | Phrase |
|---|
| 15.29% | tightness between pan |
| 14.96% | spoil tightness [perform operation] |
| 11.57% | fluid [state] tightness |
| 9.93% | liquid [state] tightness |
| 9.36% | maintain tightness [perform operation] |
| 7.14% | tightness between bore |
| 5.98% | check tightness [perform operation] |
| 5.12% | tightness between piston |
| 3.59% | valve tightness |
| 3.30% | air tightness |
| 2.95% | ensure tightness [perform operation] |
| 2.69% | tightness degree |
| 2.68% | keep tightness [perform operation] |
| 1.94% | provide tightness [perform operation] |
| 1.71% | gas tightness |
| 1.71% | system tightness |