Driving tanks all the alien spacecraft shot down and the game operation to defend the earth : the cursor keys w : machine guns counterclockwise rotation 驾驶坦克将所有外星人的飞船击落，保卫地球游戏操作：光标键中“ ” ：机枪逆时针旋转。
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Introduction : driving tanks all the alien spacecraft shot down and the game operation to defend the earth : the cursor keys w : machine guns counterclockwise rotation 攻略：驾驶坦克将所有外星人的飞船击落，保卫地球游戏操作：光标键中“ ” ：机枪逆时针旋转。
