... HBYC-26 Bleachers, Retractable stand ISO9001:2000 telescopic standTelescopic Seating System with HBYC-26, Tribune, Bleachers, Stand;Passed through ISO9001:2000; ... is three kinds, such as electric telescopic stand, manual stand, demounted stand;Driven system is windlass, or electrical machine box;Essential ... parallel swaying loading: 60kg/m2The Blowing mould seats loading: 200kg telescopic stand