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gangue sand maker in Mongolia East Asia

gangue sand maker in Mongolia East Asia

1. Introduction. Groundwater resources play an important role in sustaining water needs ofAsia. Groundwater is widely adopted for crop irrigation, food production, industry, and domestic use in urban and rural communities, accounting for about 25% of total water usage inAsia().The groundwater withdrawal amount inAsiaaccounts for the majority (72%) of global usage value, caused by ...

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