Through field observation and theoretical study. we found that the Hanxing mining area has a typical ternary structure in coal mining under high water pressure of the aquifer. This ternary structure is the Ordovician limestone aquifer-aquiclude including thin limestones-coal seam. Although the aquiclude is considerably thick. https://www.diegojavierfares.com/top-super-SOLD-Used-Olympia-Cremina-1979-Refurbished-120-volt-Brown-save-big/