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21. | shaker conveyer |
| 震动运输机 |
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22. | a house of two storeys |
| 两层的楼房 |
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23. | sharp pounding |
| 剧烈震动 |
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24. | jolt molding machine |
| 震动造型机 |
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25. | To quiver; vibrate. |
| 颤抖;震动 |
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26. | shattering zone |
| 震动带 |
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27. | earthquake motion |
| 地震动 |
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28. | concussion of blasting |
| 爆破震动 |
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29. | earthquake vibration | earthquake tremor |
| 地震震动 |
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30. | constant vibration |
| 恒定震动 |
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