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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

Patent Applicant:zhubo

Type of Patent:实用新型

Application Number:201420812691.0

Number of Inventors:1

Service Invention or Not:no

Application Date:2014-12-18

Publication Date:2015-04-29

Authorization Date:2015-04-29

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