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In soil science, agriculture and gardening, hardpan or soil pan is a dense layer of soil, usually found below the uppermost topsoil layer. [1] There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water. Some hardpans are formed by deposits in the soil that fuse ...
These are a modern version of the old storefront crank-up awnings of the last century. The two, three or four tension arms (width dependent) and a top tube are supported by a torsion bar . With a Traditional 'Open Style' folding arm awning the torsion bar (also known as square bar) fits into wall or soffit or fascia or roof mounted brackets ...
Aluminium (or aluminum) metal is very rare in native form, and the process to refine it from ores is complex, so for most of human history it was unknown. However, the compound alum has been known since the 5th century BCE and was used extensively by the ancients for dyeing .
SunSetter's primary product lines are awnings, but the company also manufactures retractable screens, solar shades, flagpoles, and mats. [citation needed] The company currently produces four different types of deck and patio awnings (including motorized and manual awnings); customers choose the color and size. [1]
Window coverings comprise materials used to cover a window to manage sunlight, privacy, additional weatherproofing or for purely decorative purposes. Window coverings are typically used on the interior side of windows, but exterior solutions are also available. Window coverings may be used to manage overheating and glare issues due to sunlight.
Derveni krater, bronze, 350 BC, height: 90.5 cm (35 1 ⁄ 2 in.), Inv. B1, Archaeological Museum of Thessaloniki, after cleaning and conservation. Conservation and restoration of metals is the activity devoted to the protection and preservation of historical (religious, artistic, technical and ethnographic) and archaeological objects made partly or entirely of metal.