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周勇

Patents

一种井下快速防火抗爆承压密闭复合结构及实施方法

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Disigner of the Invention:wangzhongqiu,夏士雄,niuqiang

Type of Patent:国内

State of Patent:专利授权

Application Number:201811177247.5

Number of Inventors:4

Service Invention or Not:no

Application Date:2018-10-10

Authorization Date:2019-10-08

First Author:zhouyong