The main body is made of aluminum by die-casting minutely. Speed system is adjusted by integrated circuit, keeping running steadily. Oxygen acetylene hose is made of high quality rubber for durable use. Various kinds of spare parts can be cut as per pattern. High precision in cutting with well smooth surface. Especially for batch producing of components in same pattern. Applied to shipbuilding, oil production, metallurgy, metal structure and other manufacturers etc. Suitable for field work.