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Kina stålgear med CE-certifikat topkvalitet God pris

Solution Description Gear complex knowledgeMaterial Carbon Steel SAE1571, SAE1045, Cr12, 40Cr, Y15Pb, 1214Letc Alloy Steel 20CrMnTi, 16MnCr5, 20CrMnMo, 41CrMo, 17CrNiMo5etc Brass/Bronze HPb59-1, H70, CuZn39Pb2, CuZn40Pb2, C38000, CuZn40etc Machining Procedure Gear...