Complex sentence: National aviation forces included 42 airplanes, captured on Kuomintang air base in Ghulja on January 31,1945, all of them were damaged during battle for air base, but later part of them were repaired and put into service by Soviet military personnel in ETR.
Split into simpler sentences: National aviation forces included forty two airplanes, captured on Kuomintang air base in Ghulja on January 31,1945, all of them were damaged during battle for air base. Some of these aircraft were repaired and put into service by Soviet military personnel in ETR.