... 3:Marking depth:0.1-1.0mm Metal Marking Machine for Solar cell Semi-conductor laser Marking machine are detailed as ... change the laser beam galvanometer optical automatic marking. Application:1:Metal oxide, phosphating, plating surface marking: hardware, household items, ... electronic products and other products serial number, LOGO, etc..4:Metal Material: stainless steel, copper, aluminum, used in MP3, ...