| 21. | The girl lost her way in the cavern
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| 22. | We found it in a cavern in iceland
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| 23. | Study on weathering characteristics of surrounding rock in longmen cavern
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| 24. | Stability analysis of surrounding rock mass of longtan underground caverns
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| 25. | Some are still living in caverns
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| 26. | Stability analysis of abandoned salt caverns used for underground gas storage
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| 27. | Guide to cavern engineering geoguide 4
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| 28. | A preliminary inquiring into the taohua cavern grottoes in the xumi mountains
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| 29. | Go into the cavern with haid e
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| 30. | We put all the other things handy at the back of the cavern
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