first stage fuel filter

first fire mixture / first-fire mixture

band-pass filter / bandpass filter (BPF)

dust filter / dust shield, particle filter

dust shield / dust filter, particle filter

filter housing / filter unit

filter unit / filter housing

particle filter / dust shield, dust filter

finite impulse response filter (FIR-filter)

passband filter; bandpass filter (BPF)

first iteration of fuel (the)

fuel filter

fuel filter bowl

fuel filter element

fine fuel filter

Proton Exchange Membrane Fuel Cell (PEM fuel cell, PEMFC)

main stage

multiple-stage missile

single-stage

single-stage missile / rocket

stage

stator vane stage

two-stage missile / rocket / vehicle

two-stage solid-propellant ballistic vehicle

four-stage compressor

compressor stage

off-design stage performance

single-stage turbine

stage reaction ratio

subsonic compressor stage

supersonic compressor stage

transonic compressor stage

cumulus stage