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valve spring
valve spring (plural valve springs)


noun 
Definition:
 
1. spring holding valve closed: a spiral spring that holds a valve closed in the cylinder head of an internal-combustion engine
2. spring that closes valve: a spring that closes an opened valve
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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