目前俄罗斯的防御系统由5层组成：战壕、反坦克工事、“龙牙”系统、机枪掩体和地堡。 这条巨大的防线长约800公里，从克里米亚半岛延伸，经过赫尔松、扎波罗热、顿涅茨克,一直延伸到卢甘斯克。 Russia's defense system consists of 5 layers: trenches, anti-tank fortifications, "dragon tooth" system, machine gun bunkers and bunkers. This huge line of defense is about 800km long, extending from the Crimean peninsula, through Kherson, Zaporizhia, Donetsk to Lugansk.
