geosynchronous or-bit...[继续阅读]

    signal amplifier...[继续阅读]

    justification frame...[继续阅读]

    text filter...[继续阅读]

    TDCS(telephone data-carrier system)...[继续阅读]

    network distributionequipment...[继续阅读]

    engineeringgraphics and printing...[继续阅读]

    facsimile communi-cation network...[继续阅读]

    telephone commu-nication unit...[继续阅读]

    labeledcommon area...[继续阅读]