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| 阀门密封填料; 阀门盘根 | |||
| 阀填料 | |||
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valve packing : 23 phrases in 6 subjects |
| Aviation | 1 |
| Drilling | 4 |
| Hydroelectric power stations | 1 |
| Nautical | 4 |
| Oil / petroleum | 1 |
| Technology | 12 |
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