... ,good sell overseas 2,Increase output of oil and gas 3,used high quality ... raw material Oil fracture ceramic proppant of 69MpaGMRC has independently developed the low, medium and ... high intensity ceramic proppants with the brand No. of 52MPa, 69MPa and 86MPa. It is widely used ... exploiting petroleum and natural gas fracturing,etc.The size of ceramic proppants can be classified into: 12-20 ...