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| |||
| 螺纹端; 有螺纹的一端 | |||
| screwed end: 12 phrases in 6 subjects |
| Chemistry | 1 |
| Compressors | 1 |
| Mechanics | 2 |
| Oil / petroleum | 3 |
| Rail transport | 1 |
| Technology | 4 |
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