Wellhead assembly and Christmas treeWellhead tree, important equipments for oil gas production, consist of three parts: casing head, tubing head which are mainly used to connect string string, seal annular space between pipes each layer, control the ...

As the largest professional exporter of clothes hanger in China, we have gained a lot experiences design, production and sales orver past 18 years. With 2 own factories, 49 co-operative partners, 5 patented designs 4 registered trade-markds, are becoming top ...