Similarly, "identifiers" such as ISBN, OCLC number, LCCN, and library barcode number are used as key strings but are only identity indicators with varying strengths.
相似的，像ISBN、OCLC控制号、LCCN以及图书馆条码号这些“识别符”都是重要的字符串，它们都是识别的指示符，但是作用的大小各有不同。
Each number in a barcode is shown by seven blocks of the same size.
条形码中的每个数字都由7个相同大小的模块显示。
Methods Design and make barcode examination information labels with sequence number and different colors, which are corresponding to the different kinds of specialty and program.
方法设计与制作不同颜色的条形码检验信息标签，各种标签的条形码号码为流水号且两位前缀代表不同专业组别或项目并与标签颜色相对应。
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