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tack-weld

[tak-weld]
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verb (used with object)
  1. to join (pieces of metal) with a number of small welds spaced some distance apart.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tack welding

tack welding

noun
  1. engineering short intermittent welds made to hold components in place before full welding is begun
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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