9月8日,117大厦混凝土泵送高度达到621米,创世界混凝土泵送高度之最。 [CFP] Photo taken on Sept 8, 2015 shows the Tianjin 117 Tower and a sign in Chinese reading: "The pump used in building the 117 Tower can deliver concrete to as high as 621 meters, the highest in the world." [CFP] |
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