| http://www.w3.org/ns/prov#value | - It can also be made of channels connected to each other that extend, for example, in the periphery direction and/or are star-shaped.The invention will be explained in moredetail with reference to the drawings, wherein:FIG. 1 is a vertical section through the lower part of a valve according to the invention;FIG. 2 is a detailed view of the representation according to FIG. 1 with damage to the membr
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