| http://www.w3.org/ns/prov#value | - The bladder 36 can be normally empty in a non-expanded or contracted state prior to being inflated, or the bladder can be partially pre-filled with compressible material, including air, saline, gel, foam or sponge, for example, which remains within the bladder as a spine providing some shape in the contracted state and guiding the bladder to close passage 38.
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