вологоємність / вологоємкість; питома вологість
humidity mixing ratio (HMR)
reduction ratio / gear ratio
Voltage Standing Wave Ratio (VSWR) / voltage standing-wave ratio
jam to signal ratio (J/S ratio)
absolute humidity
atmospheric humidity
specific humidity
surface humidity
humidity
humidity control system
humidity of ambient air
humidity table
relative humidity
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
weight-horsepower ratio
weight-strength ratio
depression ratio
explosion ratio
infantry-armor ratio
forward gear ratio
fuel-air ratio
fuselage fineness ratio
compression ratio