Air-block structure
The air resistance structure comprises the base, polyvinyl alcohol or polymer film formed on the plastic film, and the compound film or vinyl chloride-acetate copolymer formed by the said polyvinyl alcohol or polymer film.
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The air resistance structure comprises the base, polyvinyl alcohol or polymer film formed on the plastic film, and the compound film or vinyl chloride-acetate copolymer formed by the said polyvinyl alcohol or polymer film. |
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