23 季节
705 插曲
现代奇迹 - Season 3 Episode 6 第 6 集
It was called the "mother lode", a deposit of silver so massive that it would produce $300-million in its first 25 years of operation, establish Nevada as a state, and bankroll the Union Army in the Civil War. Named after an early investor, we'll see how the Comstock Lode, discovered near Virginia City, proved to be a scientific laboratory from which vast improvements in mining technology and safety were pioneered, including innovations in drilling, ventilation, drainage, and ore processing.
- 年: 2022
- 国家: United States of America
- 类型: Documentary
- 工作室: History, H2
- 关键词: technology, invention, disaster, construction, machine
- 导向器: Bruce Nash
- 投:
"
"
"
"
"
"
"
"
"
"
