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| เครื่องอ่านบาร์โค้ด (An optical device that uses a laser beam to read and interpret bar codes, such as the Universal Product Codes, found on grocery products and other retail items) | |||
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| เครื่องอ่านบาร์โค้ด (An optical device that uses a laser beam to read and interpret bar codes, such as the Universal Product Codes, found on grocery products and other retail items) | |||
