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| 71. | precipitating action |
| 沉淀作用 |
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| 72. | settlement of sewage |
| 污水沉淀 |
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| 73. | scavenger precipitation |
| 清除沉淀 |
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| 74. | precipitation membrane |
| 沉淀膜 |
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| 75. | coagulation sedimentation |
| 凝聚沉淀 |
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| 76. | precipitated wood tar |
| 沉淀木焦油 |
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| 77. | precipitated calcium carbonate |
| 沉淀碳酸钙 |
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| 78. | precipitation analysis |
| 沉淀分析 |
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| 79. | precipitated pigment |
| 沉淀颜料 |
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| 80. | precipitation of calcium carbonate |
| 碳酸钙沉淀 |
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