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qingdao changyu group is composed of qingdao changyu seal co., ltd., laiyang changyu seal technology co., ltd., shanghai changyu new energy co., ltd., and shandong changyu qingdao university of science and technology technology r&d center. the company mainly produces various types of skeleton oil seals and rubber sealing products. it is currently a supplier of well-known companies such as general motors, ford, volkswagen, mazda, schaeffler, mahler, gotlark and china faw, geely, haima, byd, and chery.

advantages: high recognition accuracy and is not easy to repeat.

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check-in attendance is facing reform and face-scanning era is outdated? so what are the attendance methods at this stage and what are their advantages and disadvantages? 1. fingerprint attendance fingerprint recognition attendance can be said to be a widely used attendance method. fingerprint recognition can be used to identify different identities of different people based on the different characteristics of each person's fingerprint. using biometric technology, it can easily distinguish different identities of different people in order to achieve the purpose of verifying identity attendance.

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but obviously, even if it is not smart city platform software to promote informatization construction in recent years, the country has successively proposed the development outline and construction ideas of the national economy such as "smart city", "smart china", and "four comprehensives", and its main innovative content is inseparable from "smart city".

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