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wrist pin

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wrist pin

–noun Machinery.
a pin joining the end of a connecting rod to a trunk piston or the end of a piston rod.

Origin:
1870–75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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wrist pin  
n.  A pin that attaches one end of a connecting rod to a wheel, crank, or piston. Also called gudgeon pin.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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