spontaneous combustion coal seam的意思|示意

美 / / 英 / /

自燃煤层

spontaneous combustion coal seam相关短语

1、 spontaneous combustion coal-seam 易自燃煤层

2、 easily spontaneous combustion coal seam 易自燃煤层

3、 spontaneous combustion of coal seam 煤层自燃