... or pp belt 3.fuction:queue management retractable for the wall mounted security barrier, Brife introduction:1. Enterprise introduction: A. ... of OEM.C. The only retractor products enterprise in the Shanghai World Expo in Year 2010. 2.Function: it' a part ... , prevent accidents and control crowd.3.Use occasion: mainly used in Bank, Supermarket, Hospital, Shopping Mall, Subway, Exhibition, Railway Station ...