FIELD: machine engineering.
SUBSTANCE: gas-supplying device comprises a manifold adapted to be connected to a pressurized gas source and several channels, each of which communicates fluidly with said manifold through a separate passage connected thereto. Each of said several channels has one outlet channel formed by the open channel end, and each of said several channels has open lower part and an open end. The channels have different lengths and the cross-sectional area of each of the passages is smaller than the cross-sectional area in the flow direction of the channel associated with this passage. Aeration methods are also claimed.
EFFECT: prevention of device contamination, coordination of intake gas flow range.
15 cl, 7 dwg
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