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| 11. | square-head set-bolt |
| 方头紧定螺栓 |
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| 12. | justable head T-square |
| 丁字尺可调头 |
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| 13. | Cup head square neck bolts with small head and short neck--Product grade B |
| GB/T801-1998小半圆头低方颈螺栓B级 |
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| 14. | black square head bolt |
| 粗制方头螺栓 |
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| 15. | square head bolts |
| 四角螺丝 |
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| 16. | flattened square head bolt |
| 平顶方头螺栓 |
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| 17. | square head wrench |
| 方扳手 |
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| 18. | iron square head screw |
| 方头铁螺钉 |
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| | |
| 19. | square-head nut |
| 方头螺母 |
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| 20. | lag screw with square head |
| 方头螺钉 |
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