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31. | bottom articulated joint |
| 底部铰接缝 |
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32. | bottom flush bolt |
| 底部埋入插销 |
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33. | bottom gully erosion |
| 底部沟蚀 |
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34. | bottom blow-off |
| 底部吹泄 |
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35. | bottom water sand |
| 底部含水砂层 |
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36. | bottom-loading pressure |
| 底部承载压力 |
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37. | cross-deck bottom |
| 联结桥底部 |
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38. | bottom blow valve |
| 底部放水阀 |
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39. | bottom discharge valve |
| 底部泄水阀 |
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40. | bottom of sedimentary |
| 沉积层底部 |
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