IGURE 



SECTION 





B-7 



D-1 



SHALLOW 



B-8 



D-2 



DEEP 



B-9 



E-1 



SHALLOW 



B-10 



E-2 



DEEP 



B-U 



F-1 



SHALLOW 



B-12 



F-2 



DEEP 



Ra 



40 



