来源:Carpathian Journal of Earth and Environmental Sciences , 2015
作者:Ionela Corina CHIRILEASA (DEDIŢĂ)
关键词:Underground mining;coal quarry;...
使用许可:Unknown
来源:Carpathian Journal of Earth and Environmental Sciences , 2015
作者:Ionela Corina CHIRILEASA (DEDIŢĂ)
关键词:Underground mining;coal quarry;...
使用许可:Unknown