收录：
摘要：
Some key technical problems such as the principle of liquefied nitrogen sharp freezing, freezing technology process, design of freezing parameters, freezing construction and controlling of freeing circumstance effect have been discussed by considering the application of liquefied nitrogen freezing technology for drainpipes repair in metro interval tunnels of urban underground engineering.
关键词：
通讯作者信息：
电子邮件地址：
