| http://www.w3.org/ns/prov#value | - According to this invention, the flange, which is not stretched during the biaxial stretch blow molding process, is the thinnest portion of the preform while the side wall of the preform is several times thicker than the flange, so that a preform having a large mouth is blow-stretched to obtain a desired can body including a flange having a desired dimension without requiring any cutting process.
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