The most commonly used metal duct has a duct and flexible duct two kinds. Iron metal duct thick skin is made 1.2 ~ 3mm, typically a 3m, with coupling flanges, the clamp rubber gasket, which can be used under negative pressure ventilation duct without modification, but it is easy to joint leakage It is not convenient to move. The flexible air duct is made of glass cloth as a lining, and the outer surface is pressed with plastic or rubber. The flexible air cylinder is acid and moisture resistant, light in weight and foldable. It is 10m long and has a small air leakage. It is currently widely used in mines.
Diamond wire cutting (DWC) is the process of using abrasive wire impregnated with diamond dust of various diameters to
cut through materials. Because of the hardness of diamonds, it can cut through almost any material that is softer than the
diamond abrasive. Meanwhile it produces less kerf and wasted materials compared to solid blades . It is widely used for high
precision cutting of graphite, silicon, quartz crystal, ceramic, jade, foam, marble, stone, glass, plastic, etc.
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