open wrench

гайковий ключ (на відміну від накидного ключа - box wrench - робочий кінець такого ключа не повністю охоплює гайку)

open burning and open detonation (OBOD) (= open-pit)

T wrench / T-shaped wrench

open country / open ground

monkey wrench

socket wrench

adjustable screw wrench

adjusting nut wrench

adjusting wrench

angle wrench

chain grip wrench

cock wrench

double end wrench

hook spanner wrench

fuze wrench

wrench from the enemy

break-open

open arrest

open attack

open barrel sight

open boat

open column

open emplacement

open fire

open flank

open formation

open hostilities

open order

open out

open position

open range

open route

Open Skies Treaty