URL：https://www.researchgate.net/profile/A-Gusak/publication/235568914/figure/fig2/AS:299841025527815@1448499079869/Schematic-diagram-of-the-cross-section-of-a-pair-of-grains-in-thin-film-deposition-The_Q320.jpg
掲載元：https://www.researchgate.net/figure/Schematic-diagram-to-illustrate-the-conservation-of-total-surface-of-grain-boundaries_fig1_235568914
