地质灾害是煤矿区环境污染的主要发生源。
Environmental disasters are primary pollution source in the coal mine area.
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.
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.
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