[问答题]
A turntable of radiu cix0xgzfx.n +/*/ qv e/r7jsej.bf;vs jp ;btomy5r kg x5apps5mv5.-, nfk;7$R_1$ 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, $\omega_1$ / $\omega_2$