Warning: file_put_contents(): Only 0 of 6438 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/52065.com/index.php on line 55 lughole是什么意思,lughole的翻译,lughole音标、读音、用法和例句_伍贰汉英词典
The Application in He Gang Ming Group of Difficult Coaled Laneway's Long Wall and Lughole Explosion, Excavating Coal Techniques 难采煤层巷道长壁长孔爆破采煤工艺在鹤矿集团的应用