同时探讨了煤层变形，即糜棱化作用发生时期及形成条件。

The stage and temperature-pressure condition of deformation of coal are also discussed in…

youdao

同时探讨了煤层变形，即糜棱化作用发生时期及形成条件。

The stage and temperature-pressure condition of deformation of coal are also discussed in…

youdao