fundamental equation of flow through the conduit of variable cross-section area

echoing cross-section; echoing cross section

radar cross-section / radar cross section (RCS); radar signature; radar crossover

Bernoulli equation for steady barotropic flow of perfect fluid

Eulerian equation of one dimensional flow

velocity potential equation for three-dimensional gas flow

variable-area record section

NATO fundamental security tasks

fundamental aerodynamics

fundamental frequency

buried conduit wire circuit

taillight wiring conduit

carburetor degasser conduit

collector ring box power feed conduit

conduit for disinformation

cross-section area

cross-section area of stream filament

cross flow

frame cross member / frame cross-member

variable-area nozzle

variable-area plotting

variable-area recording (VAR)

variable-area propelling nozzle

wing-carry-through area

area of break-through

point mass equation of motion

equation

Euler‘s pump and turbine equation

momentum equation

equation of fluid state

equation of gas state

continuity equation in integral form

continuity equation of compressible non-viscous fluid