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Spec an 80mm or 58mm thermal receipt printer that survives a delivery rush: ESC/POS, cutter life, kitchen vs counter mounting, and OEM checks.
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Specifying a 2D barcode scan engine from an OEM or ODM partner: interfaces, duty cycle, screen-code reading, certifications, and 12 RFQ questions.
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How to choose a suitable QR code scanning module through a video?
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