military-grade filter

grade-ascending ability / grade ascending ability

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)

company (grade) officers (Co Off)

company grade officers

demote from a grade

down grade (adv)

field grade officers

field officer (field-grade officer / senior officer)

grade insignia

inferior grade

junior grade officers

level-crossing = (амер.) grade crossing

lieutenant junior grade

mid-grade officers

pay grade

promote to a grade of

revert to a rank / to the grade of

temporary grade

warrant officer grade I

grade sheet

adverse grade

ascending steep grade

commercial grade

weapons-grade

easy grade