大气上行、下行辐射
atmospheric upward and downward radiation
地下叠加图
subsurface stacking chart
上行下行传播时间
up and down propagation time
叠加-叠代谐波平衡法
superpositive- iterative harmonic balance (SIHB) method
叠加—叠代谐波平衡法
charges for medical services
并流下行快速流态化
cocurrent downflow circulating fluidized bed