The bearings and seals of our company's hobs are imported from Europe and the United States. Through

strict control of tool mechanism design, material smelting, forging, machining, heat treatment and assembly,

we ensure the quality of our company's tools is long. Excavation creates preconditions.

The company makes full use of the cooperation advantages of “production, learning, research and use”, and

cooperates with famous domestic universities, materials research institutes, shield/TBM construction units for

a long time, actively develops and develops new materials for knife ring, and has developed on the basis of the

original H13. A variety of knife ring materials. Its material properties cover all layers of soft, medium and hard,

meeting the requirements of long-distance tunneling in shield/TBM construction.