duplicator that transmits the copy by wire or radio

duplicator that transmits the copy by wire or radio

duplicator that transmits the copy by wire or radio

duplicator that transmits the copy by wire or radio

duplicator that transmits the copy by wire or radio

duplicator that transmits the copy by wire or radio

duplicator that transmits the copy by wire or radio

a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier

a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy

a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy