Huainan Banji coal mine introduces precasting in Main Shaft and ventilation shaft,and drilling shaft lining is precast construction in ground.是什么意思_Huainan Banji coal mine introduces precasting in Main Shaft and ventilation shaft,and drilling shaft lining is precast construction in ground.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句