[问答题]
A turntable of radius(52cx, kq ncdghq3 v(ng(g 7epqzs8o(6s - sd2b6xekj-pg 6kt 1ax5it $R_1$ 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, $\omega_1$ / $\omega_2$