полярний круг
declination aiming circle (declinated aiming circle)
polar coordinate display
polar coordinates
polar plot
cartesian-to-polar
polar-to-cartesian
polar coordinate system
polar curve of an aerofoil
polar distance
polar front
polar jet
polar latitude
shock polar
shock polar diagram
aiming circle
horizontal circle clamp
periscopic aiming circle
aiming circle monocular
artillery aiming circle
azimuth aiming circle head
killing circle
circle
danger circle
elevation circle
paraselenic circle
parhelic circle
antarctic circle
circle of position
great circle course
great circle distance
great circle heading
great circle route