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Therefore, in grinding machines, artificially obtained diamonds are used, more precisely, spraying of microalmases on a special flexible surface, which allows you to treat a concrete surface or stone coating in any small details. Of course, the grinding consumption is high, but it is much more economical and effective than using other grinding methods. The grinding coating can effectively process several hundred meters of durable concrete before it becomes unusable. It should also be noted that the GM 122 mosaic-grinding machines, which are used to grind natural stone or concrete, are not expensive, and is able to carry out its work in a short time, however, if a specialist will be controlled by a grinding machine. It is not difficult to manage to learn to learn a mosaic-grinding machine, it is manually controlled, and in skillful hands it can process large areas. True, the machine operator needs to ensure that the grinding disk with artificial diamonds does not flow, otherwise the effect of the machine will be zero, and the unit itself will be able to deteriorate. It is impossible to allow the grinding machine to process a smooth surface, because then it will be able to damage it, which is also not permissible.