| http://www.w3.org/ns/prov#value | - A nozzle pitot primary device for measuring air or gas flow within a system of air or gas fluid moving within a conduit comprising: fluid constricting means in the form of a nozzle having a longitudinal axis and an external wall that defines a fluid flow opening therein for allowing a fluid such as air or gas to pass therethrough and further including an inlet end and an exiting end and wherein th
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