Noun:

1. radio; determines the direction of incoming radio waves

directionkeys方向键directionn.方向；指导；用法说明；趋势；目标；管理directionally solidified super-alloys定向凝同高温合金directional control overcurrent element方向控制过流元件directional repture controlled blasting定向断裂控制爆破Directional Technology Distance Funetion定向技术距离函数directional drilling traction technology定向牵引技术directionally solidified eutectic nickel＆directional fracture controlled blasting定向断裂控制爆破Directional Technology Distance Function定向技术距离函数Directional probability data association定向概率数据关联Directional infrared radiative intensity方向红外辐射强度