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安全区域 ānquán qūyù
avia. safe zone
bridg.constr. safety zone
nautic., tech. safety area
tech. safe region; safety region
安全区域【核】 ānquán qūyù
el. safe range
安全区域: 17 phrases in 7 subjects
Aviation4
Ecology2
Explosives and Explosive Ordnance Disposal1
Name of organization6
Nautical2
Technology1
United Nations1