axial ratio

коефіціент еліптичності (антени)("When choosing FPV antennas, pay attention to Axial Ratio. It’s a measurement of how good an antenna is to reject signal from opposite polarized antenna."; стосується дронів)

reduction ratio / gear ratio

Voltage Standing Wave Ratio (VSWR) / voltage standing-wave ratio

jam to signal ratio (J/S ratio)

axial-flow (jet) engine

axial-flow turboshaft engine

axial load

axial observation

axial pressure

axial bearing

axial exit nozzle

axial flow compressor

axial piston pump

axial velocity

axial-flow turbine

axial (component of) induced velocity

axial fan

axial flow

axial mining

axial observation spotting

axial percussion bracket

axial-lateral conduct of fire

axial time bracket

aspect ratio

fighter-to-administrative personnel ratio

high expansion-ratio

mass ratio

power-to-weight ratio

signal-to-noise ratio (SNR; S/N)

thrust-to-weight ratio

damping ratio

attenuation ratio

base pressure ratio