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communication navigation
 communication navigation
avia. 通信导航
| instrument
 instrument
gen. 乐器
hydroel.st. 仪表
interntl.trade. 票据; 证券; 文件
met. 装置
tech. 器械; 仪器; 工具

to phrases
communication navigation
avia. 通信导航
communication navigation instrument
: 43 phrases in 7 subjects
Air defense5
Automobiles1
Aviation20
Navigation2
Project management1
Space12
Technology2