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disciplinary barracks
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discharge tube
dis·charge tube (plural dis·charge tubes)


noun 
Definition:
 
electron tube: a tube filled with low-pressure gas that glows when it conducts electricity at a given voltage. Use: neon and fluorescent lights.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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