... pump, machinetool,metallurgical equipment etc.Meantime, we also supply related products in blank, such as cylinder liner,piston ring,ADI bushing,sealing ... etc. By using our profile, the workinglife of our products will be 5 times than sand casting,and no pore ... ,sonim... Adapt to strict requirments in precise manufacturing. Application fields: FieldPart name machine toolsleeve , ...