Portable military L.B. set / [uitgave van] Bell telephone MFG. co. Antwerp handleiding Digitaal snelheidsmeten met de standaard telephone Doppler radar / [samenst.: W.B.G.M. Oude Vrielink] electrical and mechanical engineering regulations Repeater, telephone, 2-circuit : General description Repeater, telephone, 2-circuit electrical and mechanical engineering regulations Repeater, telephone, 2-circuit : First Echelon Work
