1. Because of its unique ring groove design scheme, the ring groove design scheme solves the problem of general standard parts loosening under vibration condition from the source. In addition, its unique design scheme of high clamping force and shear stress makes it have long-term high tightening force after installation, thus replacing electric welding. In many countries around the world must be bolted or welding construction, double drum core pulling rivets are using a lot of Huck standard parts instead of welding. 2. The clamping force of the standard part with high clamping force and shear stress is about 1.5 times of that of the traditional standard part of the same level. Taking China 10.9 high strength bolt (diameter 24mm) as an example, the tightening force of about 21 tons can be achieved when the torque is 900n-m. The same level of Huck tightening force can achieve 31.5 tons of tightening force. The shear stress design scheme of Huck standard parts is far beyond the clamping force. (the data information is extracted from the technical Jian Zi 1998 No. 056 of the State Railway Administration and the jgjz No. 2003wl No. 062 issued by China Construction steel quality supervision and testing center). 3. Corrosion of regulator: each standard part of Huck should be protected from corrosion before the original factory. In addition, the double drum stainless steel rivet customer's different anti-corrosion must be able to show different corrosion-resistant solutions of standard parts.