Up and over.
Technically it's ancient technology. But now the two-millenia-old-principle of the Greek mathematician Archimedes has been deployed at gargantuan scale. The Three Gorges Dam, China's marvel on the Yangtze River, is one of the world's largest engineering projects -- the product of 37...
| Cyhoeddwyd yn: | National geographic. 231, 3 (2017 (Mr)). |
|---|---|
| Prif Awdur: | |
| Fformat: | Erthygl |
| Iaith: | English |
| Pynciau: |