Haivan Pass Tunnel
CONSTRUCTION PROJECT

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Engineer Checking the Meter Calibration and First Drilling Hole for Grouting Works at Ventilation Adit Station 0+790m to 0+770m (Section D)

Kỹ sư tư vấn kiểm tra các biện pháp xử lư tại Hầm thông gió từ Sta.  0+790m đến 0+770m (Khu D)

Tháng 08/2003 - Trở về


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