... and petrochina 4.ISO 9001:2008 5.AAA credit LWC density of sand The basic situation:Gongyi tensho refractories Co., LTD. ... ratio, ChangChunLi invests 5 million yuan, of the registered capital ratio of 28%. Scope of business: manufacturing fracturing support agent, finalize ... and name. Is a unity cooperation, skills, strong sense of responsibility of the team. Senior lab nine, mainly engaged in raw ...