Gypsum is used for coating walls and ceilings construction materials. Similar to mortar or cement plaster to dry powder and this liberates heat and then hardened paste mixed with water as the material begins. Cement, unlike plaster maintain very soft after setting, and easy metal tool, or you can operate with sandpaper. These characteristics of the load rather than the finish plaster is suitable.
Investigation or land surveying technology, professional, scientific and accurate point angle and the distance between them determines the position of the terrestrial or three-dimensional and generally authorized to practice by surveying the various members of the building profession. This point is common in the earth's surface, they are often the ownership, location (corner of underground features, surface location of the building) or other governmentally required or civil purposes (Real Estate sale) of land on the map and is used to set the boundaries.- Person's name