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.

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。

youdao

The directional braking return of the boring machine after the boring process finished is the key for improving the machining quality and working efficiency.

镗削结束后的主轴定向制动处理是本工序提高加工质量和工作效率的技术要点。

youdao

A full face rock tunnel boring machine was highly sensitive to geologic situation.

全断面岩石掘进机施工对地质地层状况非常敏感。

youdao

Then we're told to get out of the cramped carriage and we find ourselves next to the large boring machine.

BBC: London's underground boring renaissance

When crews prepared to drill the giant new cavity under Second Avenue, they first had to freeze the ground to about minus 20 degrees so as not to destabilize the buildings above as the boring machine cut through.

NPR: New York Expanding Nation's Biggest Transit Hub

Bureaucratic systems and processes were put in place to make the system tick over like a boring clockwork machine.

FORBES: Gasp! Machines Still Can't Think!