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"2" align="center"<br><small>The Apollo 6 S-II stage during stacking operations in the VAB </small>
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"2" cellspacing="0" cellpadding="2" bgcolor="#FFDEAD"Fact sheet
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"http://wwwinformationdelightinfo/encyclopedia/entry/J-2_(rocket_engine)" class="copylinks">J-2 engines
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"http://wwwinformationdelightinfo/encyclopedia/entry/liquid_hydrogen" class="copylinks">Liquid Hydrogen and Liquid Oxygen
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