The postponable reduced viscosity process is a thermal cracking one of shallow degree of residual oil.
延迟减粘是浅度热裂化渣油减粘工艺。
Geological environment have double attribute of resources and calamity. Unreasonable exploitation of resources, will lead to negative environmental effect. The effect is expandable and postponable.
地质环境具有资源与灾害的双重属性，不合理的开发利用将引发环境负效应，其影响具有扩散性与延滞性。
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