新华夏系第二沉降带华北沉降区，广泛发育了帚状构造。

Brush structures are fully developed in the North China subsiding belt of the Neocathaysian system.

youdao

新华夏系第二沉降带华北沉降区，广泛发育了帚状构造。

Brush structures are fully developed in the North China subsiding belt of the Neocathaysian system.

youdao