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A roller seam welding machine is a type of welding machine specially designed for welding longitudinally welded pipe or plate. This welding machine is capable of welding the weld along the edge of the workpiece as it moves to produce a continuous weld. The roller seam welding machine mainly consists of a frame on which a welding head and drive unit are mounted. The weld head contains a welding source, such as an arc or gas flame, and is designed to track the weld along the edge of the workpiece. The drive moves the workpiece through the weld head assembly and ensures that the weld is made evenly and accurately. Roller seam welders are commonly used in the fabrication of metal pipes and sheets because of their ability to produce an efficient and uniform weld over a long length. They are also used in the automotive industry to weld car body parts, as well as in other industries where longitudinally welded pipes or sheets are required.