drop onto one knee

опуститися на коліно (‘He dropped onto one knee, his assault rifle covering the arc of fire to the front of us.’ - ‘Operation Mayhem’, Heaney with Lewis, 2014)

drop to one knee

all for one and one for all / one for all and all for one

get down on one knee

smeare thick lines of camouflage cream onto ....

project power onto the land

dead drop / dead-drop exchange

drop head body (drop-head body)

knee brace

knee pads

knee action

knee-action wheel

take a knee

one-way UAV / one-way attack UAV (OWA UAV)

air drop

drop bolt

drop tank

drop zone (DZ)

drop-off point (DOP)

free fall air drop

gravity drop

heavy drop resupply

high-velocity drop

low-velocity drop

minimum pressure drop

voltage drop

magazine drop pouch / dump pouch

extinguishing agent drop

extinguishing agent drop abort

Operation Acid Drop

cartridge drop lever spring

drop center rim

drop container