Asia
10:28, 15-Feb-2023
Tunnel boring machine: The underground transformer
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These massive monsters are a sight to behold. Despite appearing like aliens in the movie "Transformers," these metal giants were made right here on Earth, and are a marvel of Chinese engineering and ingenuity.
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Copyright © 2023 CGTN. 京ICP备16065310号
Disinformation report hotline: 010-85061466