Gansu Construction Investment Mining Yongjing Aggregate Mine Mining and Transportation General Contracting Project
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Tunnel engineering is a building constructed underground, underwater, or in mountainous terrain, where railways or highways are laid for the passage of motor vehicles. According to their location, they can be divided into three categories: mountain tunnel engineering, underwater tunnel engineering, and urban tunnel engineering. Crossing through mountains or hills to shorten the distance and avoid steep slopes is called mountain tunnel engineering; Underwater tunnel engineering refers to the process of crossing rivers or straits from underwater or underwater sources; Urban tunnel engineering refers to the process of crossing underground in cities to meet the needs of railways passing through large cities. The most frequently constructed among these three types of tunnel projects is the mountain tunnel project.
Keyword： Gansu Construction Investment Mining Yongjing Aggregate Mine Mining and Transportation General Contracting Project
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