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| 开槽凸圆头螺钉 | |||
| fillister screw: 16 phrases in 7 subjects |
| Agriculture | 1 |
| Automobiles | 4 |
| Electric machinery | 1 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |
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