| http://www.w3.org/ns/prov#value | - The spring of FIG. 23 is surrounded by a stocking 95 of some porous material which, by means of stitches or the like indicated at 97, is attached to a longitudinally extending bar or rigid wire 94, which in turn is attached to spring 80, 81 at crossing points 96 in a suitable manner, for example by spot welding, gluing or the like.
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