一种具有使用期限提示功能的口罩
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Title:一种具有使用期限提示功能的口罩
Institution:材料科学与工程学院
Type of Patent:Utility models
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
Release Time:2019-04-15