1. Cov Kev Tiv Thaiv Dej: Kev tiv thaiv dej thiab kev sib khi ntawm cov qauv xws li cov chaw khaws dej, cov qhov dej, thiab cov dikes kom muaj kev nyab xeeb ntawm cov chaw txuag dej.
2. Kev tsim kho vaj tsev: Kev tiv thaiv dej tsis zoo ntawm thaj chaw xws li hauv qab daus, lub ru tsev, thiab chav dej kom tiv thaiv cov dej los nag thiab dej hauv av, ua kom muaj kev ruaj ntseg thiab kev nyab xeeb ntawm lub tsev.
3. Kev thauj mus los Engineering Projects: Waterproofing thiab sealing cov qauv xws li tunnels thiab txuas hniav, yoog mus rau ntau yam kev tsim kho ib puag ncig thiab engineering xav tau, muab kev ruaj ntseg waterproofing tiv thaiv rau cov chaw thauj mus los.