that b I 0 I I I00 200 EFFECTIVE THRUST, F E,(10 6 NEWTONS) ..:,.,,.i iiiiiiiilliiiiiilii :::::::::::::::::::::::::::'_ 200 Fig. Z. 8--Principal elements of propulsion module 150 Q 8. I. 2. Exploration-mission Payloads ................. 151 8. i. 3. Operations .............................. 116 6. Z. 4. Post-Saturn ELVs ............................ 76 4. 2.
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