"giáo án xây dựng hầm ngầm" trang 1 - tải miễn phí từ tailieunhanh
Types of excavatinons

Types of excavatinons
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Underground works in soils and soft rock tunnnelling

Underground works in soils and soft rock tunnnelling
49    87    0
Tunnels in weak rock

Tunnels in weak rock

18    87    0
Stuctural design of pipe linings 1998

Stuctural design of pipe linings 1998
17    96    0