| http://www.w3.org/ns/prov#value | - These processes involve either the formation of a pre-form by means of a mechanical stretching device such as a plug assist, (See, e.g., U.S. Pat. Nos. 3,667,049, 3,737,494, 3,814,784 and 3,966,860), and/or the injection molding or forging of a pre-formed blank (See, e.g., U.S. Pat. Nos. 3,471,896 and 3,739,052).
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