This document discusses flash butt welding and Delta Railway Group's manufacturing of flash butt welding machines. Delta manufactures and integrates various types of flash butt welding machines, including welding head kits, containerized machines, and machines mounted on rail-road excavators, trucks, and self-propelled wagons. Delta also provides overhauling, spare parts, and worldwide service for welding machines. Photos show Delta's manufacturing process and completed flash butt welding machines and vehicles built for projects in Hong Kong, South Africa, UAE, and Germany.