Sorting technologies in postal services, including optical character recognition (OCR), video complement and address check via barcode have reached the world's top level.
邮政光学字符识别（OCR）、视频补码、码址校验等分拣技术处于世界领先水平。
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Line, circle, tilted character, external character preparation, mirrored character function, bar-code printing, and other functions.