As power inductors SF polarity identification steering characteristics sorting, taping, printing, collecting a roll of special equipment, namely power inductor products into vibration-hours, filtered into the straight track; the product is drawn by the suction nozzle Index Table; Bing by SF polarity identification and steering; after electrical test, will yield into the carrier tape, and then through an ink-jet printing, CCD visual inspection, complete with hot sealing function of the device.