Complex sentence: It was a tank destroyer with the same armament as the T-34, but because of the absence of a turret, the vehicle was 70 cm lower, had thicker armour, and was 2 tonnes lighter.
Split into simpler sentences: It was a tank destroyer with the same armament as the T-34. The vehicle was 70 cm lower than a T-34, had thicker armour, and was 2 tonnes lighter.