| http://www.w3.org/ns/prov#value | - view of the cap but with the 30 incision open, Figures 5 and 6 examples of different forms of the incision, Figure 7 a plan view of a modification of the I neck of the tube, I 35 Figure 8 a vertical section of a modified embodiment of the cap, Figure 9 a horizontal section of the latter embodiment on lines 9-4! in Fig. 8, and Figure 10 an elevation of still a further embodiment of the upper porti
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