valuable article
5.The article analysis the status and production of UOE welded pipe in the world, and describes the main process procedure, equipment as well as the online quality inspecting methods, meanwhile it also introduces UOE production mill layout, main equipment and NDT inspecting equipment of Sumitomo Metal Corp. , NKK, Nippon and Hilde Corp. Italy, it is valuable for reference of the UOE welded pipe production status abroad.
6.Acid-washing waste liquid produced in the man-made diamond purifying technology is studied in this article. On the basis of test and analysis,the scientific treating technology is designed,the valuable metal in the acid waste liquid is reclaimed and the final waste water is treated with neutralization,so that a better benefit is achieved.

