In this paper introduce Gu Jiao Coal mine 4# coal layer pressure obseve and analyze, master work face pressure rule. provide according to for reasonable mining and science manage.是什么意思_In this paper introduce Gu Jiao Coal mine 4# coal layer pressure obseve and analyze, master work face pressure rule. provide according to for reasonable mining and science manage.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句