Radius of electron donor and acceptor
radius of equivalent circle
radius of escribed sphere
radius of exinscribed circles
radius of curvature of the earth
radius of explosion cavity
radius of groove curvity
Radius of gyration
回转半径
旋转半径
回旋半径
惯性半径
遛转半径
基-基数-根值
radius of gyrationrate adaptive digital subscriber Line