Fig.5, Working model: II-type Fig.6. Ortho-contour photograph 
by the cutting method. 
  
-type 
Fig.7. Ortho-contour photograph Fig.8. Ortho-contour photograph 
by II-type. by III-type. 
  
  
pe Ü 
~ > 3 
~~ : 
© Sd = 
x. 
2 
9 = 
  
  
  
  
Fig.9. III-type. Fig.lO. Working model: III-type