| http://www.w3.org/ns/prov#value | - This object 1 have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the ac companying drawings, in which Figure 1 is a central longitudinal section of an elastic teatcup and its rigid housing; Fig..2 is an elevation, in partial section, of the same structures, showing in full and in dottedv -lines different positions of the resilient cup; Fig. 3 i
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