| http://www.w3.org/ns/prov#value | - h wax pattern from said chamber and heating said casting to a purging temperature such as to allow said wax to be drained and burned out of said plaster casting and to drive moisture out of said plaster casting thereby leaving a cavity corresponding to said heat sink in said plaster casting; (i) placing said plaster casting in a vacuum chamber together with a ladle of molten alloy and evacuating s
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