Using an impact damage-percolation experimental system for gas bearing coal or rock and an industrial CT scanning system. the authors design and carry out a series of dynamic compression-seepage tests for loading at different impact velocities under triaxial prestressed states and reconstruct the three-dimensional crevices structure of the impact-damaged sandstone in order to reveal t... https://macorners.shop/product-category/acrylic-plaque-display-stand/