[问答题]
A turntable of radius*g 2jooxj: oqqq*74 lew3 zmb osk2wibyyjhq n13+.m 6:+wt*,ms+twu $R_1$ 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, $\omega_1$ / $\omega_2$