Diameter of 9.48. It signifies the first such machine produced by China Railway's production base in Wuxi, Jiangsu Province, for export to Italy.
https://english.news.cn/europe/20240418/d73a439ab9484ca3a359a1ee21525751/c.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://english.news.cn/europe/20240418/d73a439ab9484ca3a359a1ee21525751/c.html
Chinese-made tunnel-boring machine to be exported to Italy
english.news.cnChinese-made tunnel-boring machine to be exported to Italy-