Haivan Pass Tunnel
CONSTRUCTION
PROJECT
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Progress Report > Package IA - North Tunnel Section
Main Tunnel After Blasting at Sta. 3+769 Bad Geotechnical Condition - Fracture Zone (under support type III)
Hầm chính tại Sta. 3+769 sau khi nổ ḿn với địa chất xấu
Tháng 02/2003 - Trở về
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