fine fuel filter

fine mesh filter

fine filter

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)

fine elevating gear of medium machine guns

elevation fine index

fine arms

fine grained powder

fine inching control

fine pointer dial

fine setting

fine-aggregate type of road

fine gyrocompassing

fine levelling

fine weather

fine range intensifier

fine range sweep

fuel filter

first stage fuel filter

fuel filter bowl

fuel filter element

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

air filter

filter-separator

gas-particular filter unit (GPFU)

home-made face filter