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一种地下旧注水管道修复后的连接方法及其组合连接接头

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Affilication of Author(s):材料科学工程学院

Teaching and Research Group:材料科学工程学院

Scope of patent:国内

School Sign:第一单位

Type of Patent:发明专利

State of Patent:专利授权

Application Number:2021113746212

Authorization number:ZL 2021 1 1374621.2

Number of Inventors:1

Service Invention or Not:no

Application Date:2021-11-19

Authorization Date:2023-07-25

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