At present, shallow shield tunneling technology has been very mature, but very few specific study was conducted on deep tunnel shield tunneling technology.
目前浅埋盾构隧道技术己相当成熟，深埋隧洞盾构技术的专项研究很少。
At present, shallow shield tunneling technology has been very mature, but very few specific study was conducted on deep tunnel shield tunneling technology.
目前浅埋盾构隧道技术己相当成熟，深埋隧洞盾构技术的专项研究很少。
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