underground mine
underground mine
[冶金学英汉词典]
underground mine地下矿山
是什么意思,underground mine的解释,underground mine的翻译
[专利英汉词典] underground mine
underground mine
[冶金学英汉词典]
underground mine是什么意思,underground mine的解释,underground mine的翻译
[专利英汉词典] underground mine