... :86-23-67608685 F:67608618 work principium:step motor is controlled by computer and mark pin ... object:chassis of auto and motorcycle, vehicle frame, motor, nameplate, piston, carburetor, shock absorber, cylinder mat ... transmission case, gear wheel and so on;aircraft motor, motor vane, air workpiece and so on;valve, ... per second;mark depth: 0.01 to 2 mm;mark content: Chinese and English characters, ...