The image shows a black and white drawing of a metal object with arrows pointing in different directions, set against a dark background.
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The image shows a black and white drawing of a metal object with arrows pointing in different directions, set against a dark background. The object appears to be a radiotelegraph, with a cylindrical shape and a handle on the top. The arrows indicate the direction of the light emanating from the object, and the text accompanying the drawing provides further information about the object.
