Tunnelling machines - shield machines, thrust boring machines, auger boring machines, lining erection equipment - safety requirements.
隧道掘进机。盾构机止推钻孔机螺旋钻探机衬里安装设备。安全要求。
The crossover is a usual pipeline crossing form for some deep rivers those are not able to use a boring- thrust construction method.
对于河流较深无法进行管道穿越的工程，一般采用跨越形式，而大跨度跨越工程多数采用悬索结构形式。
The crossover is a usual pipeline crossing form for some deep rivers those are not able to use a boring- thrust construction method.
对于河流较深无法进行管道穿越的工程，一般采用跨越形式，而大跨度跨越工程多数采用悬索结构形式。
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