Another characteristic of coal petrology is that transitional macerals, such as semivitrinite and semifusinite are relatively high.

此外，一些过渡型显微组分，如半镜质体和半丝质体的含量也相对高。

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Another characteristic of coal petrology is that transitional macerals, such as semivitrinite and semifusinite are relatively high.

此外，一些过渡型显微组分，如半镜质体和半丝质体的含量也相对高。

youdao