Defining opencut mining area is the key link of opencut design and construction.Defining final mining area is equal to defining the mining and stripping quantity.是什么意思_Defining opencut mining area is the key link of opencut design and construction.Defining final mining area is equal to defining the mining and stripping quantity.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句