Aircraft Warning Spheres are installed on overhead conductors to alert low flying airplanes and helicopters of the obstacle. They are generally placed near airports and on elevated spans crossing rivers, lakes, fjords, valleys, roads, railways, construction sites and pipelines. Other locations are: near military bases, police stations, hospitals, helicopter routes and other low flying areas. Warning Spheres are attached on the uppermost conductors, shieldwires or on the top of power line towers. Any inquiry: Website: http://www.cdt-en.com/ Email: sophia@chendongtech.com Phone/WhatsApp:+86-13929493960 #transmissionlines #warningsphere