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| coarse-pitch thread | |||
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粗 牙螺纹 : 14 phrases in 9 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Electric machinery | 1 |
| General | 1 |
| Mechanic engineering | 1 |
| Mechanics | 3 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 4 |
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