ABSTRACT
A.M. VAN WINGERDE University of Toronto, Canada Delft University of Technology, The Netherlands J.A. PACKER University of Toronto, Canada J. WARDENIER Delft University of Technology, The Netherlands D. DUTTA Mannesmannrohren-Werke A.G., Diisseldorf, Germany P. W. MARSHALL University of Newcastle-upon-Tyne, UK
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