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active sonar
 active sonar
IT 有源 声纳
mil., air.def. 有源声呐
oil 主动声吶
shipb. 主动声呐
| frequency analysis
 frequency analysis
corp.gov. 频数分析
health. 频谱 分析
hydroel.st. 频率分析
| and
 and
gen.
| recording
 recording
comp., MS 錄製

to phrases
active sonar
IT 有源[主动]声纳
mil., air.def. 有源声呐
oil 主动声吶
shipb. 主动声呐
tech. 主动声呐
active sonar
: 13 phrases in 8 subjects
Air defense2
Aviation1
Electronics1
Fishery fishing industry1
Geophysics1
Navigation2
Space3
Technology2