| http://www.w3.org/ns/prov#value | - As shown in FIG. 6, a base portion 82 of the bladder defines a substantially-dome shaped spring 81 for normally biasing the piston assembly 22 away from the outlet aperture 20 and into the rest position, as shown in FIGS. 6 and 15A, and a filling valve 83 for sterile filling the storage chamber 14 with a fluid or other substance introduced through a filling probe (not shown) that is inserted or ot
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