[问答题]
A turntable of radiuebz2v +khc *:*d:xulv0c5(mzv zde-arw5 pczs31ca /b,g6b( x lqs3ns $R_1$ 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, $\omega_1$ / $\omega_2$
