однозв’язна зона
simply connected region
coherent defense
non-coherent carrier keying
coherent echo
coherent echo modulation and detection
coherent impulse method
fully coherent
noncoherent integration / non-coherent integration
arid region
army readiness region
flight information region (FIR)
geostrategic region
strategic region
air defense region (ADR)
depot distribution region
ensure peace and stability in the region
hydrodynamic lubrication region
irrotational region
stagnation region
dead region
vorticity region
search and rescue region
transition region
densely populated (densely-populated) area (region) / territory / country
confusion region
region of interest (ROI)