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service module

(often initial capital letters) U.S. Aerospace. the section of an Apollo spacecraft containing the principal propulsion system, electrical system, water, and other supplies.
Origin of service module
First recorded in 1960-65 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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service module

a section of an Apollo spacecraft housing the rocket engine, radar, fuel cells, etc, and jettisoned on re-entry into the earth's atmosphere See also lunar module, command module
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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