| http://www.w3.org/ns/prov#value | - ightly offset from one another.In the lower chamber 5 there is a duplication of the elements already discussed above, and as shown in FIG. 1.In the embodiments of FIGS. 1 and 2, the housing and container 3 may be of glass, plastic, aluminum, steel, or other materials not subject to chemical or corrosive attack by the body 24 of fluid or flowable material or substance in the container3.
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