The various sliding bearings of ZOB brand are widely used in the chassis system, body system and hydraulic system of construction machinery and construction machinery. Jf-mp friction welding sleeve is used for supporting wheel, sprocket, guide wheel; The double metal and SF series bushing are used in the arm frame, connecting rod and leg of pump truck. JDB series solid inlay lubrication series are used in movable arm, bucket rod, amplitude modulation mechanism, oil cylinder etc.