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| 21. | barrier properties |
| 屏障性能 |
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| 22. | Any of various protective or ornamental coverings used to screen a light bulb. |
| 灯罩任一种用来遮蔽电灯泡的防护性或装饰性的盖子 |
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| 23. | filtration Barrier |
| 滤过屏障 |
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| 24. | antenna curtain |
| 天线屏障 |
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| 25. | photoelectric barrier |
| 光电屏障 |
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| 26. | reflection barrier |
| 反射屏障 |
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| 27. | mountain barrier |
| 高山屏障 |
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| 28. | visual screening |
| 景观屏障 |
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| 29. | multiple barrier |
| 多重屏障 |
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| 30. | vegetative barriers |
| 植物性屏障 |
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