Unbelievable support wood structure allows miners to escape from death | China Documentary скачать в хорошем качестве

Unbelievable support wood structure allows miners to escape from death | China Documentary

#history #mystery Getting fresh air in and toxic gases out of a mine is one of the greatest challenges posed to mining engineers. And if it’s still a challenge even with modern technology, the problem faced by ancient miners is unbelievable. So, how did they do it? Could the burnt bamboo sticks uncovered by the archaeologists provide a clue to the solution adopted in the Bronze Age? ▶▶Subscribe to China Documentary: https://bit.ly/31ODgus ▶The Legend of Mining and Metallurgy: https://bit.ly/3Qoe1bM Click to Watch More: ✪Resurrection of Ancient Books: https://bit.ly/3rWyJVJ ✪The Kung Fu Shaolin: https://bit.ly/44CfCPr ✪Into Chinese Kung Fu: https://bit.ly/3O9i2wp ✪Wudang, Home of Tai Chi: https://bit.ly/3nx9AdL ✪Weapons of Ancient China: https://bit.ly/3yUqXgG ✪Masters in the Forbidden City: https://bit.ly/3K7PtQp ✪Chinese Artisans and Craftsmen: http://bit.ly/3O1hb1Y ✪Most Amazing Places in China: http://bit.ly/3Gy7Hte ✪A Bite of China Season 3: http://bit.ly/3Xic8Oa ✪The Power of Nature: http://bit.ly/3xfYwIb ✪UNESCO World Heritage Sites in China: http://bit.ly/3O7OUXw ✪China’s Historic Towns: http://bit.ly/3GjKkDv ✪China's Mega Projects Season 3: https://bit.ly/3XjOgZJ ✪One Minute China: https://bit.ly/3VNiDbu ✪World Heritage Archives: https://bit.ly/3qVCJ4K