| 摘要 |
A bar code symbology derived from form a set of patterns of bar and spaces in which each character spans a distance of m module widths and is represented by n bars and p interleaved spaces; and the largest single bar or space is limited to k modules in width, having a predetermined start pattern; a predetermined stop pattern; and providing the exclusion from the set of valid patterns those patterns such that the predetermined start pattern is only at one end of a valid symbol, and the predetermined stop pattern is only at the other end of a valid symbol.
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