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21. | artificial impregnation instrument |
| 人工受器械 |
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22. | artificial impregnation |
| 人工受孕 |
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23. | foam impregnation process |
| 泡沫浸渍工艺 |
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24. | fire-retardant pressure impregnation |
| 阻燃剂压力浸渍 |
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25. | crack impregnation test |
| 裂纹浸渍试验 |
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26. | vacuum impregnation equipment |
| 真空浸渍设备 |
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27. | method of impregnation |
| 浸渗法 |
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28. | reservoir impregnation observation |
| 库区浸没观测 |
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29. | impregnation of timber |
| 木材的浸渍 |
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30. | Impregnation with ammonia or an ammonium compound. |
| 氨化作用用氨或氨化物浸渗 |
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