A fascinating exploration, in 2 episodes, of the global phenomena of skyscrapers over 300 m tall. From the world's tallest buildings to those currently under construction, engineer Rob Bell goes on a journey to uncover the secrets of these giants. Episode 1 sets out to reveal what is driving the revolution in super skyscrapers and the challenges involved in the design and construction of the foundations and the super structures of these towers.　　https://sharethefiles.com/forum/viewtopic.php?t=275909更多《慎重勇者》免费观看高清在线、慎重勇者完整版全集免费观看、慎重勇者电影完整版相关欧美综艺资源，请持续关注疯狂影迷网!