burnt rock coal的意思|示意
烧过的岩煤
burnt rock coal的网络常见释义
烧变岩 烧变岩(煤)
burnt rock coal相关例句
The coal seam roof of Huojitu mine is the burnt rock, which is the water impregnated aquifer, is dangerous to mine safety.
烧变岩是活鸡兔矿井的顶板充水含水层，直接威胁着矿井的生产安全。
Burnt rock is come into being coal bed self-ignite and bring wall rock metamorphose and has special engineering geological characteristics.
烧变岩是煤层自燃引起周围围岩变质而形成的，具有特殊的工程地质性质。