Progress in development of CLAM steel and fabrication of small TBM in China von Huang, Qunying, Li, Chunjing, Wu, Qingsheng, Liu, Shaojun, Gao, Sheng, Guo, Zhihui, Yan, Zilin, Huang, Bo, Song, Yong, Zhu, Zhiqiang, Chen, Yaping, Ling, Xinxhen, Wu, Yican

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