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Vending machine
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Issue date May 4, 2021
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Shandong New Beiyang Information Technology Co., Ltd.
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Jigang Zhang
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Issue date May 17, 2016
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Shandong New Beiyang Information Technology Co., Ltd.
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Fang Xu
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Dot-matrix printer
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Issue date Dec 9, 2014
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Shandong New Beiyang Information Technology Co., Ltd.
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Lei Zheng
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