| http://www.w3.org/ns/prov#value | - A method of altering dimensional parameters, such as diameter and wall thickness, of hollow spherical shells comprising the steps of:(a) selecting a hollow spherical precursor shell of first diameter enclosing a quantity of contained matter, at least a portion of which is volatilized and impermeable through the wall of said precursor shell at a selected first temperature above the shell softening
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