A gas conduit for venting high temperature reactor comprising a conduit portion in direct communication with the reactor for receiving gas therefrom where the conduit includes a Venturi for creating a high pressure zone in the area prior to exit of the reactor. The extracted information feature may be automatically acted upon, or may be outputted for review, editing, andor selection before being acted on. A first data unit descriptor table and a second data unit descriptor table, in which information on the first data units and the second data units are respectively recorded as data unit descriptors, are recorded. A gap is provided between the first and second prepit portion.