| http://www.w3.org/ns/prov#value | - The duplexed bus type network of the present invention comprises two transmission lines, a plurality of stations connected to a plurality of portions of both of the transmission lines through branch portions, each of the stations provided at a data input-output portion thereof with a switch and a duplexed modem portion including two modems selectable through the switch, and both of the modems bein
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