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21. | extra swing |
| 多余摆动 |
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22. | oscillating fan |
| 摆动电扇 |
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23. | oscillating plunger pump |
| 摆动柱塞泵 |
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24. | swinging of the pipe |
| 摆动吹管 |
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25. | oscillation period |
| 摆动周期 |
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26. | oscillating load |
| 摆动负荷 |
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27. | oscillating cam |
| 摆动凸轮 |
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28. | oscillating axle |
| 摆动轴 |
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29. | swinging mounting |
| 摆动支架 |
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30. | oscillating platform |
| 摆动平台 |
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