Taking the open-off cut in 10201-S working face at Sihe mine as a example,the schem,technical parameters and construction method for the support of large section open-off cut are introduce.是什么意思_Taking the open-off cut in 10201-S working face at Sihe mine as a example,the schem,technical parameters and construction method for the support of large section open-off cut are introduce.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句