施工中大量采用双层保护预应力锚索，在国内水利工程尚属首次。
The project was first one using prestressed anchors with double layer protect for construction in domestic hydraulic engineering.
使用权限信息表和数据库用户共同控制权限，对数据做了双层保护。
Double protection to the data was realized with right information table and database user.
防水PVC包装及耐磨进口牛皮纸袋的双层保护，防止产品在运送过程中受损。
Every STYLUTION matteress is packed with PVC and kraft papers to avoid the damage.
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