... 2.ISO 9001:2000 ,BV approved 3.Process: sand casting 4.Manufacture and OEM 5.Material:copper alloy 1. ... or drawing 6. Professional service 7. Process: sand process casting 8. Application: pump parts 9. Surface treatment: Polishing, machining ... bronze and so on)2.Processsand casting, gravity casting, low-pressure die casting, high-pressure die casting.3.CertificateISO9001,BV4.StandardASTM B6015. ...