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伊藤 勝彦. "〔515〕溶融ポリエチレンの膨張と破壊, D.L.T.Beynon,British Plastics,1960-9,Vol.33,No.9,p.414〜419,図12,表1." Journal of the Society of Mechanical Engineers 64.510 (1961) 1084-1085