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tracking and communications
 tracking and communications
el. 跟踪与通信
| subsystem
 subsystem
hydroel.st. 次级系统
math. 副次体系
met. 分系统; 辅助系统
reliabil. 分系统
space 分 系统
tech. 亚系统; 亚系; 亚体系

to phrases
tracking and communications system
el. 跟踪与通信系统
tracking and communications subsystem
: 37 phrases in 9 subjects
Air defense2
Aviation8
Communications1
Earth sciences1
Electronics7
General2
Space14
Technology1
Telecommunications1