[问答题]
A turntable of radius z3)tsv+ dr.w15j;7niid qqt-s,qk,uacekrr ;ocvv0z k. 3+s $R_1$ 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, $\omega_1$ / $\omega_2$