上海长江隧道工程穿越长江河口，工程施工面临诸多技术难关。
Shanghai tunnel engineering crosses Estuarine of the Yangtze River. Its geological condition have harmful effects for construction.
上海长江隧道工程穿越长江河口，工程施工面临诸多技术难关。
Shanghai tunnel engineering crosses Estuarine of the Yangtze River. Its geological condition have harmful effects for construction.
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