细节
A telegraph recorder
by H.W.Sullivan, London, with transmitting and receiving shunts, spring motor, circular magnet with cover and mahogany base with spool-drawer, two separate spools on iron bases and a Morse key, in mahogany case with brass handles -- 17in. (43.2cm.) wide
by H.W.Sullivan, London, with transmitting and receiving shunts, spring motor, circular magnet with cover and mahogany base with spool-drawer, two separate spools on iron bases and a Morse key, in mahogany case with brass handles -- 17in. (43.2cm.) wide