Application of Unloading Pressure Protection and Anti-Burst Technology in Mining Horizontal Slice of Sharp Inclined and Very Thick Coal Seam是什么意思_Application of Unloading Pressure Protection and Anti-Burst Technology in Mining Horizontal Slice of Sharp Inclined and Very Thick Coal Seam在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句