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CuSn5ZnPb5-C Bronze Graphite Plugged Bushings Cast Bronze Bearings Material graphite impregnated bushings Chemical composition % min % máx Cu 84.0 86.0 Pb 4.0 6.0 Sn 4.0 6.0 Zn 4.0 6.0 Fe 0.30 Ni 1.0 ...