Opening technology for fire extinguishing sealing of seam spontaneous combustion in No. 1303 fully mechanized caving mining face of Yunhe Mine是什么意思_Opening technology for fire extinguishing sealing of seam spontaneous combustion in No. 1303 fully mechanized caving mining face of Yunhe Mine在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句