2011年4月7日，纽约，被称作“沙狗”的隧道挖掘工人从第二大街地铁建筑工程的北向的隧道的隧道掘进机中走出。

A subway construction worker, known as a "sandhog" exits the tunnel boring machine in the northbound tunnel of the Second Avenue subway construction project, Thursday, April 7, 2011 in New York.

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我厂生产的钢管支撑系列产品广泛应用于建筑、隧道、地铁等施工工程。

I support the production of steel pipe products are widely used in construction, tunnels, subway construction and other projects.

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地铁隧道抗震研究是当今地震工程界重要的研究方向。

The antiseismic research of subway tunnel is very important in earthquake engineering.

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