Bed material samplers, as first developed , may be divided into three types.

最初的河床质取样器有三种类型.

辞典例句

The released flow from reservoirs carries less sediment load of bed material than pre ? dam periods.

建坝后水库 下泄 水流挟带的床沙质含沙量减少,坝下游河床出现冲刷.

互联网