Haivan Pass Tunnel
CONSTRUCTION
PROJECT
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Progress Report > Package IA - North Tunnel Section
Starting Excavation for Enlargement Section (for Exhaust Shaft & Clean Air Section) at Ventilation Adit Station 0-005
Bắt đầu khai đào khu vực mở rộng tại hầm thông gió Sta. 0-005
Tháng 01/2003 - Trở về
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