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杆密封 : 30 phrases in 11 subjects |
| Automobiles | 2 |
| Compressors | 1 |
| Drilling | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 6 |
| Plastics | 2 |
| Rail transport | 1 |
| Technology | 12 |
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