China Wutai Machine Group,of which,Ruian Paper Machine Co.,Ltd. Zhejiang introdued the best technology form overseas to promote China's development of envelop,paper bag and window paper patch-film with the support of State Machine & Electronic Industry Ministry and by cooperating with Beijing Printing Machine Research Office and Zhejiang University. It is the earliest Factory to gain the use right of this patent with 12 years in China. By right of eccellent quality and strong technology power and capital the company continuously develope and paper machine equipment with excellent quality so that becomes the leading one of current all enterpriess in this industry in China...