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| 螺钉锁紧装置 | |||
| 铁锁防脱落螺丝; 防脱螺丝铁锁 | |||
| screw lock: 14 phrases in 9 subjects |
| Automobiles | 2 |
| Compressors | 1 |
| Drilling | 1 |
| Electric machinery | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Plastics | 1 |
| Technology | 5 |
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