Metalworking machines tools; metalworking machines, namely, machining centers, electric welding machines, terminating machines, fusing machines, laser welding machines, and electric spot welding machines using ultrasonic vibration; metalworking machines, namely, machining centers, electric welding machines, terminating machines, fusing machines, laser welding machines, and electric spot welding machines using sound vibration; ultrasonic welding machines; welding machines using sound vibration