| http://www.w3.org/ns/prov#value | - According to preferred developments, prior to the inflow of a gas into the whirling or turbulent agitation chamber, a pressure is produced therein of below 100 Pa, such as approximately 70 Pa, preferably below 50 Pa, e.g. 30 Pa and advantageously this is achieved in that the agitation chamber can be enlarged in the closed state for producing a vacuum therein, and that after opening the outlet the
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