direction ray目标射线directionn.方向；指导；用法说明；趋势；目标；管理direction-finding antenna测向天线direction adjustment device方向调整装置direction-finding problem测向问题direction-finding baseline测向基线directional Wiener filtering方向窗Wiener滤波directional radiation burner定向辐射directionalseparation filter分向滤波器direction of public opinions舆论导向directional power protection方向功率保护装置direction finding technology测向技术