New and older railings might have to be welded during usage and can be approximately divided into four manners.

　　1. Arc welding

　　Studies have demonstrated that the bending, drop hammer, mechanical and fatigue components of the railing arc welding mind transcend the aluminum heating welding mind, along with the operation of the joints of flash welding and gas pressure welding is shut.

　　2. Aluminum heating welding has the features of no demand for electricity supply, easy gear, simple operation, quick welding rate, and reduced processing price. It's particularly acceptable for field operations.

　　Rail flash welding is presently the frequent selection for old and new railroad welding. The railroad heartbeat flash welding gear is big, so this system is only appropriate for in-plant welding of rails.

　　3. Electron beam welding is a particular processing system which accomplishes processing and welding of materials and parts by using an electron beam of high energy density within an energy provider.

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