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一种具有使用期限提示功能的口罩

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Affilication of Author(s):材料科学与工程学院

Type of Patent:发明

Application Number:201410796350.3

Number of Inventors:12

Service Invention or Not:no

Application Date:2014-12-18

Publication Date:2016-01-20

Authorization Date:2014-12-18

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