Method and apparatus for biaxially stretching films
作者： Koppehele Hugo Paul
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lens.org 参考文章(3)
Raymond S Jesionowski, Fred E Wiley, Robert W Canfield, Bailey James, Process and apparatus for producing continuous sheet of biaxially oriented organic polymer ,(1943)
Heilman Kenneth Albert, Alles Francis Peter, Apparatus for stretching webs ,(1952)
Milton A Powers, Process for sheet glass manufacture ,(1938)