煤矿环境地质灾害是煤矿区环境问题的主要发生源。
Coal mine environment geological calamity are originates of coal mine environment problems.
地裂缝灾害是西安市主要的环境地质灾害问题。
Ground fissures have been the main environment geological disaster in Xi 'an city.
地裂缝灾害是西安市主要的环境地质灾害问题。
Ground fissures have been the main environment geological disaster in Xi 'an city.
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