The drag chain is used in reciprocating motion situations, and can play a traction and protection role on built-in cables, oil pipes, gas pipes, water pipes, etc. Drag chains have been widely used in CNC machine tools, electronic equipment, glass machinery, injection molding machine manipulators, handling machinery, plastic machinery, lifting equipment, woodworking machinery, the automotive industry, industrial vehicles, metal processing machines, machine tools, casting machinery, port equipment, and other industries.