big roller chain sprocket 1.C1045 2.process bore/bore to ... , duplex, triplexMaterial: Q235, Steel 1045, stainless steel, 40Cr, 20CrMnTi, 42CrMo, copper,etc.surface treatment: polishing, black oxide, zinc plating, electrophoresis, etc ... oProductShow = new AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); big roller chain sprocket