As of November 2002 - Home | Next

Fault lines and crushing zone occurred bid cave-in on crown part at Main tunnel Sta 3+511 to 1+516

Hầm chính - Vết nứt xuất hiện tại đỉnh hầm  Sta 3+511 to 1+516

Tháng 11/2002 - Trở về

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