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Secondly, in case you are really gonna try to repair that scratched DVD then there is nothing strange, technical or mystical regarding the process. DVDs, CDs and Game Discs are made from a hard clear plastic called polycarbonate. The repair of scratched DVDs is nothing greater than a workout in polishing or re-surfacing an item of polycarbonate plastic. So in the event you are feeling somewhat nervous about attempting it. . . relax!
Underground metal detector using voice alarm and instrument, according to the detection depth to be ground area, shape, weight of the metal has a lot to do, in general, the area is larger, the more the number, the corresponding detecting depth is larger; Conversely, the smaller the area, the smaller the number and the smaller the corresponding depth. The maximum detection depth listed in the following table is embedded in the dry soil by a 60cm * 60cm * 0.5cm (0.5cm) aluminium sheet in accordance with the product's enterprise standard
Blind calcium supplementation may lead to high blood calcium, kidney stones, nutritional imbalance of mineral elements, even heart disease, prostate cancer, etc., and must be stopped. There are three factors to consider calcium deficiency. Clinical examination shows calcium or vitamin D deficiency indication (such as low bone density, high alkaline phosphatase, high calcium phosphorus product); The concentration of vitamin D in blood was normal; Low calcium intake (e.g. <3/4 recommended).
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