The whole reactor is encased in a thick concrete shield, which prevents radiation escaping into the environment.
整个反应都包裹在一层厚厚的混凝土防护层里面，避免辐射泄漏到外界环境中。
For the path of resulting in electromagnetic leakiness, the concrete method of structure design is stated about electromagnetic shield.
针对各种引起电磁泄露的途径，给出了具体的电磁屏蔽结构设计方案。
The reinforce concrete segment used in shield tunnel has some inherent shortcomings.
盾构法施工中长期采用的钢筋混凝土管片存在一些固有缺点。
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