我接受的付款账期为：30%预付款，我将每周安排人员拍摄机器生产情况，3

The payment period I accept is: 30% advance payment, I will arrange staff to take pictures of the machine production every week, 30% of the main part of the machine is paid, and the remaining 40% is before shipment. (Ps: The machine does not need to be assembled in Iran, you will receive the whole machine, and my engineer will go to Iran to train the use of the machine software)

The payment period I accept is 30% advance payment, I will arrange for personnel to photograph the production of the machine every week, 30% of the main part of the machine to complete the payment, the remaining 40% before loading. (ps: The machine does not need to be assembled in Iran, you will receive the whole machine, my engineer goes to Iran to train the use of machine software)

The payment period I accept is: 30% advance payment, I will arrange personnel to take pictures of the production of the machine every week, 30% of the main part of the machine is paid, and the remaining 40% is before shipment. (PS: the machine does not need to be assembled in Iran. You will receive the whole machine. My engineers will go to Iran to train the use of machine software.)