The attack weapons made by use of the stealth technology or low visibility technology are main target threat which would be confronted by the aerial defense systems at present or in the 21st century.

采用低可见性技术或隐身技术制造的进攻兵器是2 1世纪防空系统重点对抗的主要目标威胁。

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Through research, the main conclusions reached are as follows: (1) at present, foreign technology Sanda athletes a more comprehensive, and has the ability to both attack and defense.

通过研究，得出了主要结论如下：(1)目前，国外优秀散打运动员技术运用较全面，且已经具备攻防兼备的能力。

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