aghajanlou mentioned in this discussion is that the car is not up to date. as one of the factors of productionthe decrease in productivity in the field of mining and civil industry, and how much this lag can damage the productivity that we are considering. the processing that takes place, the discussion of logistics and cash transportation is a very basic issue, which means that practically most of the costs incurred in the field of mining sector are in the field of transportation. now, whether it is the transportation of gold within a mine or the transportation of cash in the area of ​​transportation and that is the so-called transfer of minerals between mines or in the market and at the level of the economy. if we can increase the technology of the capital level in the field of equipment, it means that the technology of our equipment will increase. in other words, we can say that the productivity in the field of our capital will also increase, which means that we will have productivity growth in the field of capital. our capital stock increases. but no matter how much these are depreciated.