Terms containing directional source

Subject	English	Chinese
geophys.	controlled directional source	可控定向源
tech.	directional light source	定向光源
tech.	directional of source force	发震力方向
otorhinol.	directional sound source	定向性声源
oil	directional source	定向震源
tech.	directional traffic power source	方向电源
oil	non-directional point source	无定向点震源
tech.	non-directional sound source	无方位声源