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Design, engineering and construction of Toheed tunnelwith 2136 m length in 30 months (remarkable project time record)
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Largest Tehran municipal tunnel project
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Utilization of prefabricated concrete segments for
facade, interior walls and Toheed Tunnel ramps
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Construction of ressalat tunnel and driving it underVali-Asr Street and main gas pipes.
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The first transport tunnel in Tehran
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Construction of Eghlid tunnel with 2610 mlength and no fatal accidents or injuries
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One of the longest inter-city transport tunnel in Iran
