thickness of coal seam造句怎麼寫

3、thick-layer apt to oxidation type characterized by large thickness of coal seam and low metamorphic degree, and transition type.

5、The change in thickness of coal seams and destruction of coal structure caused by the rheology of coal seams is the main factor causing gas outbursts of the coal mine.

2、The coal and gas outburst became more and more dangerous along with the thickness of coal seam changing and increasing.

1、thickness of coal seam

4、Combining with the production data, grey GM (1, 1) model is used to predict deep thickness of coal seam in Moxinpo.