正反循环
direct-reversed circulation
正反旋回沉积作用
cyclic-reciprocal sedimentation
正反向胀形
direct and reverse bulging
正反向预测
forward-backward prediction
正反向推理
Forward and Backward Reasoning
forward and backward inference
正反向散射型激光流速仪
forward-back-scattering type laser current meter
正反向绕包、正反向绞合
opposite-direction lapping
正反向模拟
forward and reverse simulation
正反向贯通
linkage of forward and backward blowing