Frontal Zone

frontal(frontal)apron-plain

high-level frontal zone

humidity frontal zone

Low-level Moisture Frontal Zone

mid-level θe frontal zone

polar frontal zone

strong frontal zone

strong frontal zone on lower level

clear zone zone

the alternative occurrence of fractured zone and non-fractured zone

trade-wind zone [= zone of trade wind]

zone by zone upgoing

Acute frontal sinusitis

ascending frontal bristle

ascending frontal bristles

bilateral frontal contusion and laceration

Bilateral frontal lobe laceration

blind frontal duplex structures