COUPLING 



105 



o 

 o 



09 



o 

 o 



K 



©O 



IM 



CO 



1-1 IS rt ■^ © 



U> ^ CO QD ^ 



O © © 



© O © 



ffl A © 



a> !o >o © 



tt O CO lO © 



10 lofl lo e» 





o 

 a 



u ^ 



•g 



a 



i 



B 



ID 

 tt> 

 O 



a 





d 

 o 



'So 

 o 

 "o 



I 



CI. 



a 



Is 

 &5 



O IV • • 



o Jl 61 B 



sd^ si 



<H g B « 



^ M ° e 



" -n I* +i MS 



13 a ="13 +j "AS 



""^ n .t; s K s -J s 



,a"g-j<2'S o 2 g 

 ^•g S f^B B ftg 



•« " s a gSns a 





- « 2 



_ B 

 13 i3 





13 i3 ■'X SPS*^ 

 cj B „ <3 ,a lu 5 





