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| 31. | photoelectric barrier |
| 光电屏障 |
|
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| 32. | fission barrier |
| 裂变势垒 |
|
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| | |
| 33. | floating barrier |
| 浮动挡板; 浮油栅 |
|
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| 34. | microporous barrier |
| 微孔障碍 |
|
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| 35. | threefold barrier |
| 三倍垒 |
|
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| | |
| 36. | sulphide barrier |
| 硫化物障 |
|
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| 37. | protective barrier |
| 防护屏 |
|
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| | |
| 38. | mountain barrier |
| 高山屏障 |
|
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| | |
| 39. | precipitation barrier |
| 沉淀障 |
|
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| | |
| 40. | multiple barrier |
| 多重屏障 |
|
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