| 1. | Two years later, excavation work nearby uncovered a stone and timber building.
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| 2. | Francisco Estrada-Belli, who led the excavation work at the site, said Tuesday.
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| 3. | Since its beginning, his excavation work has been supported by private contributions.
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| 4. | The excavation works at the tunnel were carried out from both sides.
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| 5. | The discoveries were the latest to emerge from the excavation works.
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| 6. | Excavation work on the two overpasses began about July 1, 1951.
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| 7. | It took 182 days of excavation work to complete the tunnel.
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| 8. | He never returned to the site and post-excavation work was never fully completed.
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| 9. | Beijing's winter weather has frozen the earth, making excavation work hard, he said.
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| 10. | Irregularly recurring sessions have led to additional finds, which suggests future excavation work.
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