Haivan Pass Tunnel
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Culvert No.3 Concrete Pipe Dia. 400mm Setting at Access Road Vent. Adit Station 0+342.5

Ống cống bê tông số 3 D. 400mm đặt tại đường công vụ lên hầm thông gió  Sta. 0+342.5

Tháng 07/2003 - Trở về


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