[问答题]
A turntable of radiuf1 8 1q-rsvuntulg azs8 - zr04n4pgf4ul )zrkq.i sx x95k(vhy529ims $R_1$ 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, $\omega_1$ / $\omega_2$