伴随着地壳的相对平稳，形成稳定的太原组煤层。

With the relatively stable crust, to form a stable group of coal in Taiyuan.

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伴随着地壳的相对平稳，形成稳定的太原组煤层。

With the relatively stable crust, to form a stable group of coal in Taiyuan.

youdao