technology parameter: mark speed: 3 to 5 characters per second; mark depth: 0.01 to 2 mm; mark content: chinese and english characters, numbers and figures with random size; figures and characters compilation: serial number marked and stored automatically, repeated number prompt, stripe in-out mark; mark material: metal and nonmetal workpiece with rigidity below hrc60; plane mark range: 100mmx80mm to 170mmx80mm or customized size; precision: work for 5 years nonstop, error less than 0.001mm; work air pressure: 0.4~0.6mpa, 3l/s; work voltage: 220vac 50hz; power: 600w; printer weight: 70kg(plane)/80kg(standard circumference printer)