sit bolt upright ( synonym found)
Definition of sit bolt upright:

°An electromechanical communications device consisting of a typewriter keyboard and printer together with a punched paper tape reader/writer and connection to a modem so that information may be sent and received over a telephone system.
Definition of sit bolt upright:

°An electromechanical communications device consisting of a typewriter keyboard and printer together with a punched paper tape reader/writer and connection to a modem so that information may be sent and received over a telephone system.
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