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'''Blockhouse Block House'''
 
<BR/>1. A reinforced concrete structure, often built underground or half 
underground, and sometimes dome shaped, to provide protection against blast, 
heat, or explosion during rocket launchings or related activities; 
specifically, such a structure at a [[Launch Site|launch site]] 
that houses electronic control instruments used in launching a rocket. 
<BR/>2. The activity that works in such a structure. 

==References==
''This article is based on NASA's [[NASA SP-7|Dictionary of Technical Terms for Aerospace Use]]''
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