Gold Index: 9899
HENAN WEIN INDUSTRY CO.,LTD. [China (Mainland)]
Business Type:Manufacturer, Trading Company City: Zhengzhou Province/State: Henan Country/Region: China (Mainland)
Drill collar
3 1/8"-11"
Drill collar are made from 4145H modified chromium-molybdenum alloy steel acc to API Spec.7 and SY/T5144
2012-06-27