Farther away from the bar code scanner, scan line width wider.
扫描仪距离条形码越远，扫描线的宽度越宽。
This invention improves the precision of the watermark bar code on the false proof paper, which makes the width of each watermark bar code equal, and the portable coding information is exact;
提高了防伪纸张上设置的水 印条码的精度，使各水印条码宽窄一致，携带的编码信息准确；
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