2 . To prevent outdoor groundwater or rainwater from entering the basement through the waterproof casing, it can ensure a good construction environment for subsequent equipment installation.
3 . Pipe through the waterproof external wall, should be pre-buried with the structure of rigid or flexible waterproof casing.
4 . Pipeline through the wall, through the floor, through the roof should be pre-set holes with the structure, to be buried after the construction of the structure and then casing, through the wall pre-set casing at both ends must be sealed with tape and so on.
5 . The pipeline and pressure measuring pipe at the floor, wall and diffusion room of the human defense should be buried with the structure of the closed casing.
