Tunnel pre-drainage drilling protection device
LU605365B1Active Publication Date: 2026-09-08SHANXI XINGTONG ENGINEERING CONSULTING CO LTD +2
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Patent Information
- Application Number
- LU605365
- Authority / Receiving Office
- LU · LU
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2026-03-05
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2032-03-05
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