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| 气密性; 不渗透性 | |||
| 密封不渗透，气密性 | |||
| 耐压紧密度; 耐压密闭性 | |||
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pressure tightness : 18 phrases in 8 subjects |
| Aviation | 2 |
| Chemistry | 1 |
| Mechanics | 2 |
| Mining | 1 |
| Nautical | 2 |
| Oil / petroleum | 3 |
| Shipbuilding | 1 |
| Technology | 6 |
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