The metamorphic grades of Minleh and Changma areas are prehnite-pumpellyite and prehnite-actinolite facies, respectively.

民乐与昌马地区变质火山岩，变质度分别为葡萄石-绿纤石相和葡萄石-阳起石相。

Some different metamorphic grade coals surface character was changed through the hypothermia thermal transnature in order to influnce the rheidity of coal-oil-water ternary material.

对几种不同变质程度的煤采用低温热改质,使煤表面的性质发生变化,从而影响煤油水三元料浆的流变性。