网络释义
1)bureau public road classification system,美国公路局土壤分类法(BPRCS)2)Public Roads Administration Classification of Soils,美国公路管理局土分类法3)USCAA soil classification,美国民航管理局土壤分类法4)Unified soil classification,美国统一土壤分类法5)classification of crude oils by Bureau of Mines,美国矿物局原油分类法6)Bureau of Public Road (renamed to FHWA),美国联邦公路局
