A portable precast slab that provides a foundation for a variety of industrial equipment that can be placed at locations where permanent foundations cannot be installed, or where an immediately usable foundation is needed. An agent comprises a data rule concerning the data entity. Accordingly, the stability and the work efficiency of the whole system are improved. The power supply unit is capable of supplying voltage to the function unit via the power distributing unit. In this embodiment, the gas cluster ion beam process deposits a material that deactivates the upper corners of each opening that is formed into an interconnect dielectric material. The server is configured to communicate inventory information from an inventory database to the mobile communication device and the mobile communication device is configured to communicate inventory update information to the server, and the server is further configured to update the inventory database based on the inventory update information.