All drilling holes were conducted b

All drilling holes were conducted by the method of rotary drilling with pump cable or dam washed with a solution of clay . The entire drilling should be conducted by the method of closing a quintal .
In the drilling process must always check the depth monitoring and recording layered rocks, water levels appear and stability in each drilling holes.

Kết quả (Anh) 1:

All drilling holes were conducted by the method of rotary drilling with water pump cable or dam washed with a solution of clay. The entire drilling should be conducted by the method of closing a quintal.In the drilling process must always check the depth monitoring and recording layered rocks, water levels appear and stability in each drilling holes.

Kết quả (Anh) 2:

All drilling holes Were Conducted by the method of rotary drilling with pump cable or washed with a solution of dam clay. The entire drilling nên Conducted by the method of closing a quintal.
In the drilling process always check the depth phải monitoring and recording layered rocks, water levels and stability that vẻ drilling holes in each.