Feature
1. High-quality and high-strength alloy structure steel is selected to produce all sorts of shank rod.
2. Adoption of surface hardening heat treatment technique can prevent the impacted end....
See more »Changsha Tianhe Drilling Tools and Machinery Co. Ltd., which is located in Hanpu Scientific and Educational Park, Wangcheng County, Changsha, Hunan, China, has become a specializing plant producing....