黑龙江干流
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main heilongjiang river 黑龙江干流
main stream of heilongjiang river 黑龙江干流
·2,447,543篇论文数据，部分数据来源于NoteExpress
The Songhua Biver Nitrobenzene event not only causes the harm to Songhua Biver main currents, but also affects the quality of the boundary river of Heilongjiang.
松花江硝基苯污染事件不仅对松花江干流造成危害，也影响到界河黑龙江的水质。
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