a concrete cutting too much, not above, stratified perfusion, vibration or under false information and vibrated with bad, - not allowed under vibration also expected.
The skin of a building consists of both transparent elements (windows) and opaque elements (walls). Windows are traditionally glass, although plastics are being used, especially in schools where breakage creates a maintenance problem. The wall elements, which are used to cover the structure and are supported by it, are built of a variety of materials: brick, precast concrete, stone, opaque glass, plastics, steel, and aluminum. Wood is used mainly in house construction; It is not generally used for commercial, industrial, or public building because of the fire hazard.
tmzx929 LV2
谢谢