. . "BT-20" . "BT-series" . . . "BT tank#A-20G" . . . . . "BT-7" . . "A-20" . "BT-5 tanks" . "2.23" . "BT tanks" . . "BT-7M" . "BT-5" . "BT tank" . . . "5.58" . . . "BT-7 tanks" . "BT-2 & BT-5" . "BT series of tanks" . . . . . . . . "BT_tank" . "BT-203" . "BT-series tanks" . "BT" . "BT tank#BT-20" . "BT Series" . . . . . . . "BT types" . "BT fast tanks" . . "BT-2 tank" . "BT-7M (BT-8)" . . . . . . "BT tank" . . . . "BT-4" . . . . "fast tank" . "BT tank's" . . . "BT-7A" . . . . "BT Tanks" . "''Bystrokhodny'' (fast) tanks" . . . "BT-2" . "BT series" . . "2.25" . .