| http://www.w3.org/ns/prov#value | - The stopper 28 is provided by a ring of synthetic rubber or resin, such as, for example silicone, and is mounted in the barrel 17 to be slidably displaceable to a downstream position, ie. towards the nipple 11, as fluid 22 is discharged from the reservoir 16 through the fluid flow path 20 as the plunger 23 is displaced in a downstream direction towards the nipple 11.
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