时间-时间-时间交换网络
Time-Time-Time Switching Network TTT
大气上行、下行辐射
atmospheric upward and downward radiation
下行-上行流
downward flow-upward flow
传播时间式超声流量计
time-of-flight ultrasonic flowmeter
后效晚点传播时间
after-effect delay spread time
间隔传播时间曲线
interval transit time curve