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地物回波
 地物回波
avia. hash
el. permanent echo
geol. permanent echoes
|
 Z 图
math. Z-chart

to phrases
地物回波
avia. hash
el. permanent echo
tech. background return; clutter; ground clutter; ground echo; radar clutter
地物回波固定目标回波
geol. permanent echoes
地物回波: 3 phrases in 2 subjects
Air defense1
Space2