||an airtight compartment in which the air pressure can be regulated, usu. situated between two areas that have different air pressures, as in underwater operations. [2 definitions]
||a lock operated by turning a dial to a set series of numbers or letters.
||to make someone not able to enter a place.
||a way of marching extremely close together and precisely in unison so that marchers' legs do not collide with the legs of those in front of them. [2 definitions]
||to lock a place or thing so that others cannot get into it or take it.
||a thin nut screwed over another nut in order to stop it from coming loose. [2 definitions]
||a lock in which a spring automatically shoots the bolt.
||a lock attached to a timing mechanism that prevents it from being opened until a specific time.
||a partial or complete interruption of the flow of liquid fuel in an internal combustion engine that is caused by the formation of bubbles of vapor or air in the fuel line.