Recently found out that in the 19th century, in order to build an underground sewer system, Chicago was raised by jackscrews. Some streets, sidewalks and buildings were even relocated! Amazing!!
最近發現在 19 世紀時，芝加哥市內竟然用千斤頂把整棟建築物，甚至整個街區墊高來鋪設下水道，太神奇了！
最近發現在 19 世紀時，芝加哥市內竟然用千斤頂把整棟建築物，甚至整個街區墊高來鋪設下水道，太神奇了！
