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| multiple thread | |||
| multi-step thread | |||
| multiple start screw thread; multiplex thread; multistart screw thread; multistart thread | |||
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| multiple thread | |||
| 多头 螺纹: 8 phrases in 4 subjects |
| Automobiles | 1 |
| General | 2 |
| Mechanic engineering | 1 |
| Technology | 4 |
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