breackthrough
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breackthrough |
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| navigate by keyword : adit alignment back blast boring breackthrough cavern cavity concrete construction crete crosscut cut cutter drill drilling drinking energy excavation gallery grade granite gunit hall hard head headrace heavy hole hydro long machine man mining molasse plant power pressure profile project renewable rock round shaft shot site slope sustainable system tbm tunnel tunneling tunnelling water |
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| Breackthrough of a tunnel excavation of a hydro power project |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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