| 摘要 |
PURPOSE: A ring code is provided to read the barcode of a circular product in all directions and to input information on the circular product being transferred in a certain direction or located at a certain position. CONSTITUTION: A ring code, annular barcode, is composed of concentric circles representing encoded characters or numbers. The concentric circles have two or more colors, and are different in thickness and interval. The ring code is attached to a circular product to be read in all directions. |
