regarding how the renovation of namegan should be done , let's see it together, let's go back and continue conversation. 40% decrease in productivity of mines is one of the topics that it is directly related to wear and tear of mining machinery. an issue that has been approved by most miners and activists in the mining field over the past years. but how to supply these machines from domestic production or foreign markets. it is one of the most important challenges in this field, which brings supporters and opponents. mehrdad akbarian, secretary of iran iron and steel association, currently there are about 30,000 mining machines in the country, and more than 60% of them are worn out. and they work with low efficiency and high fuel consumption. we need at least 15,000 new machines to replace them they do gholamroza naz according to the head of khorasan razavi mining house, the production of domestic mining machinery provides up to 20% of the country's needs, and there should be no restrictions on the import of mining machinery of any capacity at least for the next few years. farid dehghani,