9 Grammatical Pitfalls

center punch

a punch for making shallow indentations in metal work, as to center drill bits.
Origin of center punch
1875-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for center punch
  • It is important to center punch the hole and use a drill bit smaller that the bolt hole.
  • The decedent was using the machine to center punch holes into metal plates when the incident occurred.
  • Use center punch on all holes to prevent drill from wandering.
  • Before fastening any questionable material, the operator shall determine its suitability by using a fastening as a center punch.

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