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high density air navigation
 high density air navigation
el. 高密度空中导航
| defense
 defense
box. 防御
interntl.trade. 抗辩
IT 防护力
sport, bask. 防守; 守方
| electromagnetic warfare
 electromagnetic warfare
el. 电磁战
| system
 system
tech. 制度

to phrases
high density air navigation
el. 高密度空中导航
high density air navigation defense electromagnetic warfare system
: 1 phrase in 1 subject
Aviation1