pillar supporting method
pillar supporting method
[煤炭科技英汉词典]
pillar supporting method煤柱支撑法
在采空区中留适当宽度煤柱以支撑顶板的岩层控制方法。
是什么意思,pillar supporting method的解释,pillar supporting method的翻译
pillar supporting method
[煤炭科技英汉词典]
pillar supporting method是什么意思,pillar supporting method的解释,pillar supporting method的翻译