High quality raw ore and reasonable treating process are the guarantee for quality of diatomite. 优质的原矿和合理的精制工艺是保证硅藻土质量的前提。
A double-solvent process for the simultaneous deasphalting and solvent treating of a lubricating-oil stock or any residual or distillate base stock. 对润滑油料或任何渣油或馏分油基础油同时进行脱沥青和溶剂精制的双溶剂过程。
