| 摘要 |
An apparatus for directing a curtain of air along a predetermined path into a pit in which material is burning from an elongated plenum positioned adjacent one margin of the pit. The air exits the plenum through an elongated nozzle assembly communicating with the interior of the plenum member. The path of the air from the nozzle is adjustable by means of a vane to enhance the oxidation of the burning materials and to reduce the amount of smoke produced.
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