土壤分类系统:1。 USDA2。AASHTO3。USCS
土壤分类系统:
1。USDA(美国农业部的三角形纹理分类系统)
2。Aashto(美国州公路和运输官员协会分类系统)
3。USC(统一土壤分类系统)
January 22, 2026
January 22, 2026
January 22, 2026
January 21, 2026
January 21, 2026
January 21, 2026
January 20, 2026
January 20, 2026
January 20, 2026
January 19, 2026