The coal resources are very rich in China. There are 5 coal series distributing 4 kinds of coal bearing basin controlled by two structured systems.
我国煤炭资源丰富，共有5大煤系分布在两种构造体系控制的4类含煤盆地中。
The coal resources are very rich in China. There are 5 coal series distributing 4 kinds of coal bearing basin controlled by two structured systems.
我国煤炭资源丰富，共有5大煤系分布在两种构造体系控制的4类含煤盆地中。
应用推荐