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中空通信卫星
 中空通信卫星
earth.sc. medium-altitude communications satellite
| 系统
 DPA系统
pest.contr. DPA System
 F系统
rem.sens. F system
 PELV系统
el.mach. PELV system
 SELV系统
el.mach. SELV system
 TN 系统
IT TN system
 TN-C 系统
IT TN-C system
 TN-C-S 系统
IT TN-C-S system
 TN-S 系统
IT TN-S system

to phrases
中空通信卫星
earth.sc. medium-altitude communications satellite
el. medium altitude communications satellite
中空通信卫星
: 9 phrases in 6 subjects
Aviation1
Earth sciences1
Electronics3
General1
Space2
Technology1