[问答题]
A turntable of radiusb0ydf +hiztp3n(w/ tl5hem 9y.zr3j16ehnp0uu-l 2ggx4: fg $R_1$ 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, $\omega_1$ / $\omega_2$
