| Share | Phrase |
|---|
| 31.27% | gas-tight [tightness] seal |
| 18.16% | gas-tight [tightness] manner |
| 9.51% | gas-tight [tightness] barrier |
| 9.51% | gas-tight [tightness] sliding |
| 7.56% | gas-tight [tightness] wall |
| 7.40% | gas-tight [tightness] penetration |
| 6.21% | gas-tight [tightness] chamber |
| 5.50% | gas-tight [tightness] lock |
| 4.83% | gas-tight [tightness] fashion |