大气上行、下行辐射
atmospheric upward and downward radiation
上行下行传播时间
up and down propagation time
下行-上行流
downward flow-upward flow
平行上下解
Parallel sub-super solutions
上、下行波分离
separation of up-going and down-going wave
上、下行通道
upstream and downstream channel
上下行带宽控制
downlink and uplink bandwidth control
上下行多址
uplink and downlink multiple access
上下行分离区段
Sections of seperate up and down lines
上下行通道
upstream and downstream channel