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SEED AND APPARATUS FOR STRUCTURING A RORFORMATED ARK OF A TERMOPLASTIC MATERIAL
SEED AND APPARATUS FOR STRUCTURING A RORFORMATED ARK OF A TERMOPLASTIC MATERIAL
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机译:用于构造热塑性塑料方舟的种子和装置
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摘要
P-2663 PROCESS AND APPARATUS FOR STRETCHING A TUBULARLY-FORMED SHEET OF A THERMOPLASTIC MATERIAL AND THE PRODUCT PRODUCED THEREBY . There is described in a preferred embodiment of the present invention, a process and apparatus for biaxially stretching a tubularly-formed sheet of thermoplastic material in a first station and a plurality of second stations wherein the first and second stations are provided with sets of rolls having generally sinosoidallyshaped grooves perpendicular and parallel, respectively, to the axis of each set of rolls to produce hags of improved strip tensile breaking strength.
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