The dustfall samples collected under typical dust and non-dust weather were made particle size analysis in Lanzhou.
选择兰州市典型沙尘天气和非沙尘天气收集两类降尘，并对其进行粒度测定。
The dustfall samples collected under typical dust and non-dust weather were analyzed to examine their composition in Lanzhou.
选择兰州市典型沙尘和非沙尘天气收集两类降尘，并对其元素组成进行测定。
The dustfall samples collected under typical dust and non-dust weather were analyzed to examine their composition in Lanzhou.
选择兰州市典型沙尘和非沙尘天气收集两类降尘，并对其元素组成进行测定。
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