Visiting the under-construction Molavi Station in southern Tehran on Tuesday, Ali Emam also said the work will be completed in 20 days, ISNA reported.
"Located deep under a historical spot in the capital with an age-old urban pattern, precision in construction and fragility of architecture have been intensively considered in the building of Molavi Station," Emam said.
Underlining efforts to maximize the localization of subway development, Emam said 60% of electric equipment used in the station are locally manufactured. Furthermore, the whole tunnel has been constructed using locally developed machinery, Financial Tribune reported.
Emam noted that on the inauguration day, 16 new train cars made by domestic producers will also be added to the line's train fleet.
Currently, the line's headway has reached 15 minutes, which will be further reduced with the addition of new trains.
The 27-km Line 7, which connects the northwest to southeastern parts of Tehran, will have 25 stations after completion.
As the western flank of the line was partially inaugurated, the launch of the eastern section of Line 7 has connected southeast to the northwest of the capital.
The first three stations of the line were launched in March. Commuters were first able to take the subway from Helal Ahmar Station in downtown Tehran to Tarbiat Modarres Station near Chamran and Jalal Al-e-Ahmad expressway junction to Sanat Square in northwest Tehran.
By March 2020, three more stations on Line 7 will begin operations.
Line 7 was partially opened in June 2017 by Tehran's former mayor, Mohammad Baqer Qalibaf, during his 2017 presidential election campaign. The line’s premature launch was strongly criticized by public transport experts and urban planners because it disregarded safety rules and protocols.
Tehran Mayor Pirouz Hanachi now says all safety standards have been observed.
Tehran’s subway network stretches over 220 kilometers and comprises seven lines (1 to 7) with nearly 120 stations. Many stations of lines 6 and 7 are under construction.