The underlying surface conditions of Loess plateau area have been changing great because of human activity, which results in affecting the features of producing run-off and conveying sand.
在人类活动的影响下，黄土高原地区的下垫面条件发生了很大变化，这种变化影响了流域的产流输沙特性。
The conveying belt type filter device is convenient and safe and can completely remove the filter residue on the filter screen surface.
本过滤装置可方便、安全、彻底地清除滤网网面上的滤渣。
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