JQ-50 metal logo engraver jewelry metal marking portable laser marking high speed up to 7000mm/s ... -code, sequence number, bath number, date, bar code, etc.Metal logo laser marking machineYAG laser markerlaser engraver on salelaser marking ... :Electronics industry, communication, electrical equipment, clock and watch, glass, jewelry, dress and personal adornment, etc.5. SamplePlease don't hesited ...