gradation testsizing assay testsizing test粒度分析: grading analysis试验: experiment; test; trial土壤粒度分析试验方法: standard test method for particle-size analysis of soils粒度试验(粒度分析): size fraction analysis粒度分析 筛分试验 筛分析 筛析: screenanalysis下载手机词典可随时随地查词查翻译