预应力锚索是针对可能不稳定的岩体或建筑物基础施加预应张力，以提高不稳定体的抗滑能力和结构力。
The prestressed anchor cable is to exert prestressed tension on unstable rock mass or structure to improve anti-slide capacity and structural stress of unstable rock mass.
世卫组织认为各国应预做准备，确保充分的抗生素供应。
WHO regards it as prudent for countries to ensure adequate supplies of antibiotics in advance.
混凝土采用预拌混凝土，混凝土用搅拌运输车送至施工现场后用混凝土输送泵压送至模板内，其摊铺厚度应高于设计厚度15～20%。
The concrete are pre-mixed concrete, delivered to site with mixer car and then pumped into forms. The paving thickness shall be 15~20% higher than the designed value.
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