[问答题]
A turntable of radiuuq fd :*wn-z7/ awvzd7+x bi48uys)(+dcmejqiuk (kglt( (/zs $R_1$ 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, $\omega_1$ / $\omega_2$