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nap-of-the-earth flight
avia.	掠地飞行 (flying); 超低空飞行 (flying)
English thesaurus
nap-of-the-earth flight
USA	Flight close to the Earth’s surface during which airspeed, height, and/or altitude are adapted to the contours and cover of the ground in order to avoid enemy detection and fire (JP 3-09.3)