cr 
= 
p 
= 
© 
= 
o 
= 
U 
— 
or 
m 
= 
O 
© 
[19] 
QD 
E. 
© 
+ 
un 
U 
+ 
e 
© 
x 
p 
x 
U 
ST 
> 
Y= 
o 
e 
e 
= 
Se 
= 
© 
+ 
= 
e 
CO 
Scale of illustration approximately 1:10 000 
  
  
  
  
  
  
  
Fig. 2.