longwall mining to the dip or to the rise
longwall mining to the dip or to the rise
[煤炭科技英汉词典]
longwall mining to the dip or to the rise倾斜长壁采煤法
长壁工作面沿倾斜推进的采煤方法。
是什么意思，longwall mining to the dip or to the rise的解释，longwall mining to the dip or to the rise的翻译