... the frequency of more than 200 per second by compressing air and make charaters and figures by continuous point lattice on ... ,transmission case, gear wheel and so on;aircraft motor, motor vane, air workpiece and so on;valve, ironware, reamer, saw, gun, pipe ... for 5 years nonstop, error less than 0.001mm;work air pressure: 0.4~0.6Mpa, 3L/S;work voltage: 110 ...