... Quality Management System 4.Professional Exporter 1045 different type Industry Sprocket Specification MaterialC45, A3, 40Cr, 20CrMnTi, 42CrMo, copper, ... requirement.Industry Roller Chain Sprocket-Simplex Type B Product range from simplex,duplex,triplex quadruplex,quintuples,o on. ... capablities.4.Industrial roller chain of sprocket style are simplex, duplex , triplex and quadruple..so on5.A technical ...