The blood flow frequency imaging of peritrophoblastic artery flowing was searching by pulse Doppler, it was high extendingflow and low resistance.
用彩色能量图显示低速血流，用脉冲多普勒寻找高舒张期低阻力滋养动脉血流频谱。
2
Each heat exchange tube has a plurality of flow channels extending longitudinally in parallel relationship from its inlet end to its outlet end.
每个热交换管道具有多个从其入口端纵向平行地延伸到其出口端的流动通道。
3
We described the distribution network flow and get an algorithm of minimum cost flow about a special distribution network flow problem by extending the network simplex method.