inside out 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)

inside framework

outside and inside threat

inside clinch

inside the wire

agent inside the intelligence service

destroy from the inside

inside beveled piston ring

inside brake cheek

inside gear

inside of track

inside tire protector

inside turning angle

inside wheel

wait out / wait-out

air filter

filter-separator

fuel filter

gas-particular filter unit (GPFU)

home-made face filter

individual portable filter

oil filter

RF interference filter

filter stack

military-grade filter