longitudinal river slope 纵比降 ; 河道纵比降

longitudinal river bed profile 河床纵剖面

river longitudinal profile 河流纵剖面 ; 河道纵断面

longitudinal profile of river bed 河床纵断面

longitudinal consequent river 纵顺向河

longitudinal dispersion coefficient of river 河流纵向离散系数

longitudinal profile of river 河床纵剖面

river bed longitudinal profile 黄河河床纵剖面

river longitudinal dispersion coefficient 河流纵向离散系数