enviromental pollution वाक्य

Enviromental pollution classification and external insulation selection for high voltage transmission line , power plant and substation
Oil leak brings not only great waste of lubricants , but also enviromental pollution . it threntens the safety of the operators and affects the image of the enterprise
The application of hydroprocessing technology extends the source of fcc feedstocks ; deepens the extent of crude processing ; and improves the yields of light oil products , as well as reduces the enviromental pollution