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| 21. | protective equipment |
| 防护设备 |
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| 22. | protection from acceleration effects |
| 加速度防护 |
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| 23. | protection of distance |
| 距离防护 |
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| 24. | protective footwear |
| 防护鞋 |
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| 25. | protection window |
| 防护窗 |
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| 26. | protective device |
| 防护器具 |
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| 27. | protective area |
| 防护区 |
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| 28. | protective fence |
| 防护围栏 |
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| 29. | protective barrier |
| 防护屏 |
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| 30. | protective glass plate |
| 防护玻璃片 |
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