| http://www.w3.org/ns/prov#value | - reactive metals to close tolerances and with desirably smooth surfaces. atent O DESCRIPTION OF PREFERRED EMBODIMENTS In accordance with the present invention, an expendable pattern of the shape to be cast is first formed of wax or other suitable material which can be removed from the completed mold by melting, vaporization, or by use of a heated solvent in customary manner.
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