gamma rays γ-rays

Polar and non-polar columns

Roentgen rays {= X-rays}

X-rays (Roentgen rays)

β-rays (beta rays)

> Polar Fleece

10(average)10 non-polar surface

100%polyester micro suede bounding with polar fleece

500 hPa northern polar vortex

active polar surface

Admissible polar topology

anchorage system in polar region

angle between two polar positions

angle of polar are

antarctic circum polar current

antarctic circum-polar water mass

antenna polar pattern measurement

anterior polar cataract

apparent polar-wander path