| 摘要 |
The invention relates to a breathing-controlled inhalation device for dry powders, having an air guide unit consisting of an essentially cylindrical body, said air guide unit comprising a flow passage provided alternately with constrictions and in each instance following enlargements, said constrictions and enlargements passing continuously one into another, and the flow passage for the air flowing through the air guide unit being of three-dimensional meander-like conformation.
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