Red alert 2 Iron-Curtain

新增红警2的铁幕装置，按下获取瞄准器后点击一个位置来释放，可以在一小段时间内使范围内的实体无敌；如果科技足够发达，你的思路足够清奇，它或许还能够帮助你实现全自动无敌，详见科技描述。Add Iron-Curtain Device of Red Alert 2 to the game, press to obtain the collimator/automatically call a device and click a position to protect entities within the range for a period of time. If you have some novel ideas, it may also help you achieve a fully automatic invincible defense system. For more information, see the technology descriptions.