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The middle pillar is also called the middle court, for example: 1 meter 1 meter window, pull a middle court horizontally is minus the number of frames on both sides, the column is if the top mouth height is 70 to subtract the height of the two boxes, and then subtract 70, and then subtract the height of a middle court, if the bridge is broken, it is to add nine millimeters to the size of the subtraction, wash and suppress it, hehe, look slowly.
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Aluminum alloy building profiles are building materials made of aluminum and aluminum alloy materials. It is usually processed into castings, forgings, foils, plates, belts, tubes, rods, profiles, etc., and then made by cold bending, sawing, drilling, assembling, coloring and other processes. Aluminum alloy building profile performance.
Pure aluminum has low strength and its use is limited. However, adding a small amount of one or several alloying elements, such as magnesium, silicon, manganese, copper, zinc, iron, chromium, titanium, etc., can obtain aluminum alloys with different properties. The cooling strength of aluminum alloy is greatly improved, and the aluminum profile of Anhui is high.
The standard potential of the aluminum extruder of aluminum is volt, the chemical properties are very active, and it is easy to react with the oxygen in the air to form a firm and dense oxide film, so in the ordinary atmosphere and clean water, aluminum has good corrosion resistance. However, galvanic corrosion occurs when it comes into contact with steel or other metal materials, corrosion occurs when it comes into contact with alkaline materials such as concrete, cement mortar, and lime in a humid environment, and corrosion can also occur when it comes into contact with wood, soil, etc. Therefore, proper antiseptic treatment is required.
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