Shanghai Precede One Way VisionMaterial Co,Ltd,located in bustling metroplis,Shanghai.Precedecompany has been committed to study one way vision film, andsuccessfully developed the exclusive technology which is differentfrom the traditional ones,it is the only one domestic enterprisewon the produce authorization of invention patent for OWV,(PatentNO. is ZL2005 1 0020 198.0). Precede company has successfullytransformed the patent into the achievements and achieved greatsuccess. Welcome to contact us by precedesale66 at yahoo dotcom