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passive tracking
 passive tracking
avia. 无源跟踪; 被动跟踪
| and
 AND
el. ; 逻辑电路"与"
 and
gen. ; ;
busin. 以及;
| radar
 radar
environ. 雷达

to phrases
passive tracking
avia. 无源跟踪; 被动跟踪
space 无源[被动]跟踪
passive tracking
: 22 phrases in 5 subjects
Air defense5
Aviation3
Electronics6
Space5
Technology3