low-grade fuel

grade-ascending ability / grade ascending ability

commercial grade fuel

high-grade fuel

low-RCS target / low-radar-cross-section target

low flying aircraft / low-flying aircraft

low-flying, low-speed drone

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

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

military-grade filter

adverse grade

ascending steep grade

commercial grade

weapons-grade

easy grade

high-grade guncotton