| http://www.w3.org/ns/prov#value | - fitting on the pressure surface of the plunger;FIG. 9 is an embodiment of the opening portion of the beverage preparation unit;FIG. 10 is a top view of the opening portion of FIG. 9;FIG. 11 is another embodiment of the opening portion;FIG. 12 is a cross sectional view of the capsule as positioned at rest within the housing of the beverage preparation unit according to another embodiment of the in
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