CN213928454U - 一种隧道施工用自动报警装置 - Google Patents
一种隧道施工用自动报警装置 Download PDFInfo
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Effective date of registration: 20230329 Address after: Group 8, Third Resident Committee, Dongjie Office, Linkou County, Mudanjiang City, Heilongjiang Province, 157000 Patentee after: Qiao Liang Address before: 441000 group 5, Niushou village, Niushou Town, Fancheng District, Xiangyang City, Hubei Province Patentee before: Quan Lei |
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Effective date of registration: 20240204 Address after: Room 102, No. 309 Jianguo Street, Daoli District, Harbin City, Heilongjiang Province, 150000 Patentee after: Harbin Chengtou Mingtai Video Information Technology Co.,Ltd. Country or region after: China Address before: Group 8, Third Resident Committee, Dongjie Office, Linkou County, Mudanjiang City, Heilongjiang Province, 157000 Patentee before: Qiao Liang Country or region before: China |