URL：https://www.researchgate.net/publication/329791139/figure/fig1/AS:712700409683968@1546932427015/3-D-schematics-and-top-views-of-one-unit-cell-of-uniform-diameter-a-4-diameter-b.jpg
掲載元：https://www.researchgate.net/figure/3-D-schematics-and-top-views-of-one-unit-cell-of-uniform-diameter-a-4-diameter-b_fig1_329791139
