The expressway tunnels construction in Henan province used new Austrian tunnelling method, which emphasized on site monitoring and measuring, and improving design and construction using the results.
河南某高速公路隧道工程全部采用新奥法施工，该施工方法的特点之一是注重现场监控量测，并利用量测结果及时补充设计和指导施工。
The development of a new type of axial flow fans used in railway tunnelling is the key research project for solving the difficult problem of ventilation in the construction of long tunnels.
研制新型的铁路隧道施工用通风机，是解决长隧道施工通风技术的关键。本文是这项科研课题的阶段性成果。
The development of a new type of axial flow fans used in railway tunnelling is the key research project for solving the difficult problem of ventilation in the construction of long tunnels.
研制新型的铁路隧道施工用通风机，是解决长隧道施工通风技术的关键。本文是这项科研课题的阶段性成果。
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