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 ## Main unit
 
+![](../images/dev2b/img18.jpg){width=60% }
+![](../images/dev2b/img19.jpg){width=60% }
 
-### Rapid Prototype #３　　
-
+![](../images/dev2b/img20.jpg){width=60% }
 <br>
 
+
 ## Seed
 ### Biomaterial trial (Kombucha)
 Currently, the wings are made of PLA, a biodegradable material. However, it requires conditions such as high temperatures and microorganisms. So there are problems with leaving the seed wing in nature to decompose.
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