filter stack

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)

exhaust manifold stack

holding stack

STACK (Strategy, Tactics, Attributes, Conversation, and Knowledge)

stack arms

stack formation

stack supplies

stack up reserves

in the stack

stack

stack (drone)

air filter

filter-separator

fuel filter

gas-particular filter unit (GPFU)

home-made face filter

individual portable filter

oil filter

RF interference filter

military-grade filter

slave oil filter

bag filter

bath filter

centrifugal oil filter

disk filter