Many miners were entombed in the cave when there was an accident at the mine.

矿井发生事故时许多矿工葬身于坑内。

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The accident that the facilities of people's air defense happen, because of rupturing, falling into the reason to leak, cave in and infiltrate by a large scale

人防设施发生的断裂、陷漏、塌方和大面积渗水；

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