[问答题]
A turntable of radius 49 djwczfdgfif7+r( pzs- 3/igvj,e;2 3qe;m,f: s(ho ndgqxrz a3io*mk79 q$R_1$ is turned by a circular rubber roller of radius $R_2$ in contact with it at their outer edges. What is the ratio of their angular velocities, $\omega_1$ / $\omega_2$