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17～19世纪的武器大多采取目视、准星瞄准等十分简单的瞄准方式,依靠数量上的优势来命中目标,作战效能非常低。到了20世纪,随着科技的发展,军事武器也取得了巨大的进步,战争规模也变得越来越大。随着武器装备科技含量的提高,单件武器的造价呈现飞速上涨的趋势,显然一枚航空炸弹要比一颗迫击炮弹贵得多。如果大量昂贵的
Most of the weapons of the 17th and 19th centuries took a very simple aiming approach such as sighting and aiming for aiming at a target. They relied on the advantage of quantity to hit the target and the combat effectiveness was very low. By the 20th century, with the development of science and technology, great progress has also been made in military weapons and the scale of the war has also become larger and larger. With the improvement of the scientific and technological content of weapons and equipment, the cost of a single piece of weapon shows a trend of rapid increase. Obviously an aerial bomb is much more expensive than a mortar bomb. If a lot of expensive