520 



O ,G — Q a" 



O O Of o 



I " • 



■TAP 7-'3 

 4 CORNER HOLES 



XxThex bolt 



BOTH FACES 

 SURFACE GROUND 



CONTINUOUS FILLETWELO 

 CONTINUOUS FILLET WELD 



TApi-'3 

 4C0RNER HOLES 



SECTION A-A 



DRAVirNBYHRG 



1-24-46 



FIG. I 

 DETAIL OF DIAPHRAGM GAUGE 



UERL WOODS HOLE, MASS 



