things have been monopolized by three american companies, mehdi qoqabi of the sedavasima news agency, fanavaran, a knowledge -based company. the success of the recycling valve i will localize this device, it is one of the strategic products in the power plant and petrochemical industry. it means that it started from today that the government tried to manage the import. the import management is also for a strategic product, a product that was made by european countries , 15,000 euros for each number of these countries. it was sold to our country in order to stop the importation and foreign exchange of this product , in the first step, research work was needed. the most important member of protection a control in the centrifugal pumps of steam boilers, which is strategically used in power plants, a product that automatically adjusts the intensity of the water flow to the steam boilers, and if the water path leading to the centrifugal pumps has an accident, the water flow will be cut off, but this safety valve internal construction has other features, if we don't have the amount of consumption, th