river bed placer是什么意思

中文翻译河床砂矿

网络释义

1)river bed placer,河床砂矿2)sandy bed river,砂质河床3)sand river,(干)砂河(床)4)channel sand,河床砂<地>5)channel sands,河床砂层6)bed dume,河床砂丘

Channel pattern discrimination for sandy bed rivers and gravelly bed rivers;

砂质河床与砾石河床的河型判别研究