Or in less than three minutes your time!
http://www.cnet.com/news/watch-1200-japanese-engineers-switch-an-above-ground-train-track-to-a-subway-line-in-three-hours/?
Tom's Blog on Life and Livingness
Or in less than three minutes your time!
http://www.cnet.com/news/watch-1200-japanese-engineers-switch-an-above-ground-train-track-to-a-subway-line-in-three-hours/?