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41. | Rub off rust |
| 把锈擦掉 |
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42. | active depression |
| 主动衰退 |
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43. | Risk of rust |
| 生锈险 |
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44. | rust inhibiting lubricant |
| 防锈润滑剂 |
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45. | temporary rust prevention |
| 暂时性防锈 |
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46. | splotches of rust |
| 锈斑 |
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47. | Rust attacks metal. |
| 锈能侵蚀金属。 |
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48. | resistant to rust |
| 不生锈的 |
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49. | Rest breed rust. |
| 不活动,必生锈。 |
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50. | rust of sunflower |
| 向日葵锈病 |
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