frontal(frontal)apron-plain
high-level frontal zone
Low-level Moisture Frontal Zone
mid-level θe frontal zone
strong frontal zone on lower level
trade-wind zone [= zone of trade wind]
trans-frontal sinus frontal approach
air distribution on a zone by zone basis
near zone to far zone transformation
north-south seismic zone (N-S seismic zone)
the alternative occurrence of fractured zone and non-fractured zone
Time-domain near-zone to far-zone transformation