发明申请
US20080145469A1 EXTRUSION APPARATUS FOR MAKING MULTILAYER ARTICLES 有权
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EXTRUSION APPARATUS FOR MAKING MULTILAYER ARTICLES
摘要:
In certain aspects of the invention, an extrusion apparatus for making a multilayer article includes multiple discs, each of which has at least one passageway configured to permit fluid flow therethrough in a flow direction. At least one of the discs includes a cone shaped portion extending substantially parallel to the flow direction.
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