The profile base geological survey works are available with the following characteristics:+ Layer 1: clay and sand, soft plastic-hard plastic, thickness about 3, 4 m + Layer 2: sand/clay clay sand, hard plastic, layer thickness of about 7 m.+ Layer 3: sand, sand and powder, the thickness of about 18 m.Choose pile, pile length 23 m plug in class 3 is optimal.
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