[问答题]
A turntable of radiuauz 1q8olv03y 7s nnm2r2tzbk nef2o) ,fb, 9iu j37i8;spzhvs $R_1$ 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, $\omega_1$ / $\omega_2$