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Wu Lian, Smart Retina Door Lock, Date first available Jan. 16, 2019, [online]retrieved Feb. 16, 2021, available from internet, https://www.amazon.com/Integrates-Fingerprint-Identification-BiomEtrics-Solution/dp/B07MVPJN6Q/ref=sr_1_9?dchild=1&keywords=NANJING+lock&qid=1613485406&sr=8-9 (Year: 2019). |
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