In the course of daily living activities, under the current development pace man accidentally contaminate water sources with chemical waste from the factory, the factory. The individual units using water well drilling rig, form after discontinuation does not use non-sealed the holes drilled back make dirty water flowing into and contaminate groundwater.
đang được dịch, vui lòng đợi..
![](//viimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)