| 摘要 |
PURPOSE: A method for using a digital door-lock is provided to improve the convenience of a product delivery process using the invoice number of a delivery service. CONSTITUTION: The invoice number of a delivery service is inputted to a digital door-lock. The inputted invoice number is stored in the digital door-lock. A delivery service person inputs the invoice number of the delivery service into the digital door-lock. Whether the stored invoice number and the inputted invoice number are matched is verified. If both numbers are matched, the digital door-lock is unlocked.
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