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| 41. | collection coefficient |
| 收集系数 |
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| 42. | seed collection |
| 种子收集 |
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| 43. | Open Collection |
| 打开收集 |
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| 44. | collection of sewage |
| 收集污水 |
|
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| 45. | waste collection |
| 废物收集 |
|
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| 46. | collecting pump |
| 收集泵 |
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| 47. | litter collection |
| 收集垃圾 |
|
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| 48. | collection efficiency |
| 收集效率 |
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| 49. | collect some article |
| 收集文章 |
|
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| 50. | collection procedure |
| 收集程序 |
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