... 辐射防护屏 radiation shield 环形防护屏 ring shaped shield; ring-shaped shield 激光防护屏 laser guards ...
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ring shaped shield 环形防护屏
As a sophisticated tunnel lining type, the universal wedge-shaped segments can do a good job in the control of the axis of the shield-driven tunnel and the quality of the segment ring.
通用楔形管片作为一种较先进的隧道衬砌形式，在盾构法施工中能够较好地控制隧道掘进轴线和管片成环质量。
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