... by the marker. The process is: to execute stencil-plate with the content needed to be marked ... at first, then put the stencil-plate on the workpiece, press the mark head ... with mark liquid on the stencil-plate for 1 to 2 seconds at last. ... electro-chemical marking liquid, electro-chemical marking head, stencil-plate, direction of electro-chemical marking liquid and technology ...