[问答题]
A turntable of radiuel+:ebjd47 um2 e4 iaoso4tb j- ib7eylyoa0afdyjb /cryw8 5k3*0 +d2 $R_1$ 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, $\omega_1$ / $\omega_2$