发明授权
US4038008A Production of net or net-like products 失效
生产网络或网络产品

Production of net or net-like products
摘要:
An apparatus for the production of perforated tubular film i.e., net is disclosed. A tube of a thermosetting polymer is continuously extruded and the extrusion opening is alternately interrupted first from one side of the tube and then from the other thereby doubling the capacity of the machine.
信息查询
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