Later, engineers managed to construct railways in a system of deep tunnels, which became known to the tube.
之后，工程师们设法在深邃道系统中修建铁路，成为地铁。
The technique of precise engineering surveying for high-speed railways is one of the key techniques to construct high-speed railways successfully.
高速铁路精密工程测量技术是高速铁路成功建设的关键技术之一。
The technique of precise engineering surveying for high-speed railways is one of the key techniques to construct high-speed railways successfully.
高速铁路精密工程测量技术是高速铁路成功建设的关键技术之一。
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