not help iran in setting up a city railway , and even provided iran with the knowledge of it tepe yahya bin would not hand over such technology to the europeans and americans in maragheh. no one was willing to consult . something had to be done, which seemed almost impossible considering the problems ahead. we also had three zakat machines. for the construction of the subway, there were americans who had almost no value in attracting iron, the expertise of experts in this field, not being familiar with the equipment and tools that need to be paid for, and the lack of funds were the main problems in the way of this project. the construction started and the experts started working everyone who was in the field of mechanics and downloading came to collect all those who knew how to work and could help, and made trips to countries that have subways, iranians made many trips to countries that have this technology in the form of visitors. all the experts, among all the experts of the university, we always took the game team with us under the pretext that we want to visit your subway to see which t