The paper presents the preparation of the polymer, and the principle and methods of polymer control water gas production. Through analysis, the water plugging effect of VS/VA/AM three-part co…

FDI in service sector was mainly focused on distribution service, real estate, transport services, computer application services, and the production and supply of electricity, gas and water.

Given the deforestation, soil erosion, water pollution and greenhouse gas emissions that will result if worldwide meat production continues to rise, some people are already choosing to eat less meat.