Inner Mongolia Yidong Petroleum Fracturing Proppant Co., Ltd is Your Best Choice . As the professional manufacturer, specializing in the research, production and sales of ceramic proppant, We pay more attention to our quality-control standards . We inspect raw materials and finished products on a daily basis. All of our finished products have been tested and approved by our Quality Assurance Team before leaving the factory.   We are dedicated to studying 详细介绍