There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine.
铀矿山坑道污水含有铀、镭、钍、钋等放射性核素，外排前必须加以处理。
There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine. The effluent must be treated before discharging.
铀矿山坑道污水含有铀、镭、钍、钋等放射性核素，外排前必须加以处理。
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