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| 81. | eat away by rust |
| 被锈坏 |
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| 82. | Why does steel rust? |
| 为什么钢铁会生锈呢？ |
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| 83. | stem rust of wheat |
| 小麦秆锈病 |
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| 84. | petroleum base rust preventive |
| 石油基防锈剂 |
|
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| 85. | stripe rust of cereals |
| 麦类条锈病 |
|
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| 86. | hard film rust preventives |
| 硬膜防锈剂 |
|
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| 87. | stripe rust of wheat |
| 小麦条锈病 |
|
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| 88. | thin film rust preventive |
| 薄膜防锈剂 |
|
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| 89. | Iron gathers rust easily. |
| 铁易生锈。 |
|
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| 90. | needle rust of spruce |
| 云杉叶锈病 |
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