[2019-8-28]
ISO 9001 annual surveillance audit...[2019-8-28]
Party member education...[2018-8-2]
The president of HUASHI GROUP attend TPCO’S CONFERENCE FOR KEY CUSTOMERS IN 2018...[2018-7-9]
Chen Leiming, vice president and secretary general of the China metal materials circu...[2018-7-9]
The 2017 annual work summary and innovation commendation conference of Huayou was suc...[2018-7-9]
Huayou and SP. steel tube attended the 15th Moscow international oil and gas exhibiti...[2018-7-5]
Weld treatment of spiral steel pipe...[2018-7-5]
Technical characteristics of spiral steel pipe...[2018-7-5]
Extrusion control in straight - seam steel tube production...[2018-7-5]
Introduction to material differentiation of straight seam steel pipe...[2018-7-5]
Analysis of large caliber seamless tube structure and its chemical activity...[2018-7-5]
Inspection of starting point and end point of large-caliber thick wall seamless steel...
