A gauge or dial has multiple displays for indicating various vehicle operating conditions. The method includes the steps of: generating a write code sequence based on the data to be recorded; determining a write pulse waveform, defining the power modulation of the energy beam, according to the code lengths of respective codes included in the write code sequence; and modulating the power of the energy beam based on the write pulse waveform. a liquid, to be treated, the passage further including a mixing chamber downstream of the steam injection where the mixture is accelerated upon the creation of a low pressure zone occasioned by the condensation of the steam, a dispersed droplet regime and a shock wave being generated downstream of the nozzle. A printing control unit 13 supplies predetermined drive signals to the heating element drive circuits based on pixel printing data input from an external source. , connecting the workpiece to the anode of a DC power supply and immersing a cathode of the DC power supply in the bath, and applying a current across the bath.