Question re USSR in Afghanistan

[Epoletov_SPR]

Rus web page

Originally tank divisions of 40-th Army have been armed by tanks T-55. But, as general Gromov recollected, in a prediction of fighting operations, since January, 1980 of an army have started to receive tanks T-62 and T-64. The last, the truth, tests by high mountains have not sustained: brought a duple diesel engine, and in DRA they for a long time were not late. But T-55 and T-62 in mountains were at war long enough.