| 摘要 |
In the pumping process the ground can be stabilised by the addition of suitable material having regard for the high load to which it is subjected. It is possible to use hand-operated water or air pumps, with the addition of loose pistons, and where coarse material is handled dewatering takes place in separate double pipes. By continuous analysis, data is received covering the alimentary content, acidity and metal solutions in the ground water. Any substances that are lacking can then be added. |
