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为了防止雷达和其它探测仪器发现,飞机的隐身术也越高明。法术之一是涂保护色,用可见光探测就比较困难。办法之二是缩小机体,改进机形。苏联的米格21型战斗机既长且轻。它和美军的新式大型战斗机F15相比,即使接近距离小二、三倍也不易被发现。一般来说机体越小,在雷达上反射的面积也越小。隐身术之三是研究能吸收雷达波的涂料。最近日本研制出一种磁性材料球性能优良,引人注意。
In order to prevent the radar and other detection equipment found, the stealth of the aircraft is also better. One of the spells is a protective color that is more difficult to detect with visible light. The second solution is to narrow the body, improve the shape. The Soviet MiG-21 fighter is both long and light. Compared with the new large-scale fighter F15 of the U.S. military, it is not easy to find even a small distance of two or three. In general, the smaller the body, the smaller the area reflected on the radar. Third, stealth technology is to study the radar can absorb the paint. Recently, Japan developed a magnetic ball of good performance, attracting attention.