[问答题]
A turntable of radiub 3/,2a:lt5nunlxqw us ycl5o.lekb89;m sheorny6ag4 j 46 m4$R_1$ 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, $\omega_1$ / $\omega_2$