Through exploration and research for several years, the company began to research concrete drag pumps of WSL series in 1997. Through combining strong points of imported and domestic pumps, and integrating various advantages on a pump surface objectively, they can achieve the goal in height and amount. And at the same time, they can deliver coarse aggregate concrete http://www.wanshilegroup.com/ and high labeling concrete. Their results can not be achieved by imported pumps in the same industry around China.