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8 天
What If A Masonry Gravity Dam Suddenly Collapsed?
"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a ...
PBS
7 年
Gravity Dam: Repair It!
You've advised the resort owners to repair the dam. They're thrilled. In 1995, when a spillway gate failed in the Folsom Dam in California, engineers spent more than $100 million to repair it.
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