and a cheaper price, people would buy it, which means there is a lot of knowledge in bayan 's production. to pay the level of a knowledge company foundation in science and technology park of tehran university succeeded in commercializing the grinding machine after making a laboratory sample. usually , magnetic stones have a precise filing function on the metal in order to achieve very high precision and the parts can be used in the workshop. all large industries need magnetic grinding machines. it has been years since they entered the country, and those machines that are used in large industries especially to complete their production lines are worn out. 50 years before and this device works there, the boycott is also discussed . this machine has the ability to grind parts up to 4 meters in length, which is stronger than the best examples in the world . one of the important features of this machine is that it grinds parts diagonally. without different angles of stone, this range of stone surface in all magnetic stone devices the devices do not have the capability. the price of this device is due to the foreign sample . the difference is a quarter of the foreign price . for more information