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51. | structure collapse rescue |
| 结构倒塌救援 |
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52. | V-type collapse |
| V形倒塌 |
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53. | COLLAPSE AND ABANTONMENT |
| 瓦解与遗弃。 |
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54. | collapse karst gorge |
| 岩溶嶂谷 |
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55. | salt-collapse structure |
| 盐塌构造 |
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56. | formation collapse sticking |
| 地层坍塌卡钻 |
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57. | an economic collapse |
| 经济崩溃 |
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58. | come down;collapse |
| 塌下;坍塌 |
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59. | earth surface collapse |
| 地表塌陷 |
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60. | collapse of airway |
| 呼吸道萎陷 |
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