中煤地质报数字报第2541期

http://digital.zmdxw.com/Img/2021/1/mobile20210113e11293ab7a0b4f56b7480a831c255bdc.jpg?editionid=985

专版,中煤地质报

http://mobile.zmdxw.com/content/2021-01/14/edition985_A4.html