With the development of mine development and extension and technical transformation, which of the following development application proportion is also developing trend in China's coal mines? In particular, the comprehensive development of main inclined shaft- auxiliary vertical shaft has been widely used in deep mining and technical transformation mine.( )
选项:
A:Comprehensive development;
B:Shaft;
C:Inclined shaft;
D:Adit
发布时间:2024-05-20 13:41:20