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| 21. | impregnation of timber |
| 木材的浸渍 |
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| 22. | impregnation compound |
| 浸渍化合物 |
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| 23. | impregnation structure |
| 浸染状构造 |
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| 24. | artificial impregnation instrument |
| 人工受器械 |
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| 25. | artificial impregnation |
| 人工受孕 |
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| 26. | method of impregnation |
| 浸渗法 |
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| 27. | foam impregnation process |
| 泡沫浸渍工艺 |
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| 28. | vacuum impregnation equipment |
| 真空浸渍设备 |
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| 29. | crack impregnation test |
| 裂纹浸渍试验 |
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| 30. | reservoir impregnation observation |
| 库区浸没观测 |
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