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21. | multistage blower |
| 多级鼓风机 |
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22. | multilevel action |
| 多级作用 |
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23. | multilevel subroutine |
| 多级子程序 |
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24. | multistage model |
| 多级模型 |
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25. | multiple expansion |
| 多级膨胀 |
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26. | multiple-stage antenna |
| 多级天线 |
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27. | multiple stage centrifugal pump |
| 多级离心泵 |
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28. | multi-stage fire pump |
| 多级消防泵 |
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29. | multiple stage crushing |
| 多级破碎 |
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30. | multi-stage pumping station |
| 多级泵站 |
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