942018.fig.0018a
(a)
942018.fig.0018b
(b)
942018.fig.0018c
(c)
942018.fig.0018d
(d)
Figure 18: D20-B SEM image of each scale (a) the first scale (34 μm), (b) the second scale (23 μm), (c) the third scale (13 μm), and (d) the forth scale (6 μm).