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Catena a rulli in acciaio legato 20CrMnTi di alta qualità, certificata ISO9001:2015, 219h, 68L, 70L per bicicletta, prodotta in Cina.

Product Description Product Description Material: 45#Steel,20CrMnTi,40Cr,20CrNiMo,20MnCr5,GCR15SiMn,42CrMo,2Cr13stainless steel,Nylon,Bakelite,Copper,Aluminium.etc Process: The main process is Gear Hobbing, Gear Shaping and Gear Grinding, Selecting…