| http://www.w3.org/ns/prov#value | - In this embodiment, a separator material, such as a sheet of aluminum, brass, magnesium, or other heat and pressure tolerant material, as would be apparent to one skilled in the relevant art, preferably is placed between the two pieces of upper material when the mold halves are closed, such that the right and left uppers are not molded to each other during the molding process.
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