河流调查
In the high mountain area under arid climate, stream sediment geochemical survey at the 1/ 50000 scale was carried out with the sampling density of 4 points per square kilometer. The grain size of the sample in initial preparation stage was-20~+ 120 mesh.
在干旱高山景观区,以4点/km2的采样密度,选择-20~+120目粒级段为初加工粒级,开展1∶5万水系沉积物地球化学测量。
Survey on Data Stream Management System
数据流管理系统综述
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