Question

in 1928 the 3 ussr had twin policy of what

Answer 1

https://en.m.wikipedia.org/wiki/1928_in_the_Soviet_Union here is alink

Answer 2

It was the Economic Policy.

There was shortage of 20 millions tons of grain to feed the people in the towns.

The problem was actually increasing due to industrialization.

This policy was launched in two parts, the first one was collectivism and the second part was for industrialization.

Therefore, it is said as twin policy.