| 摘要 |
An improved air concentrator nozzle for creating an increased air exit velocity from an extension tube of a portable blower or blower/vacuum. The extension tube tapers from a larger, upstream end to a smaller, downstream end. The nozzle is inserted into the upstream end of the extension tube and drops until it protrudes outwardly from the downstream end of the extension tube. An interference fit between an exterior surface of the nozzle and an interior surface of the downstream end of the extension tube restrains the nozzle relative to the tube.
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