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66 67 68 69 70 71 72 

 TIME (YEAR) 



CONTOUR : MLW 



714 75 



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64 65 66 67 68 69 70 71 72 73 74 ^5 



TIME (TERR] 

 CONTOUR : MSL 



a 

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65 56 67 68 69 70 71 72 73 74 75 



TIME (YEAR) 

 CONTOUR : MHN 



DISTANCE FROM THE BASE LINE TO STATED CONTOURS AT HB 29 



115 



