单词	center punch
释义	center punch noun : a hand punch consisting of a short steel bar with a hardened conical point at one end used for marking the centers of holes to be drilled Example Sentences Recent Examples on the Web Use a center punch and a hammer to mark the location of the hole and to give the drill bit a place to start without wandering. Bradley Ford, Popular Mechanics, 30 Sep. 2021 The Penguins’ 1-2 center punch, until the big dogs return, might be Jake Guentzel and Jeff Carter. BostonGlobe.com, 11 Sep. 2021 Start each hole with a center punch, and bore the 1-inch intake holes with a step bit [8]. Joe Kohl-riggs, Popular Mechanics, 26 June 2021 Prevent the drill bit from wandering by first marking the center of each part with a center punch. David Agrell, Popular Mechanics, 12 Dec. 2020 Oryx center punched with a triad of .300 Winchester Magnum loads loped into the sands of the Kalahari, never to be seen again. Ron Spomer, Outdoor Life, 13 Jan. 2020 Buy a center punch and strike it with a ball-peen hammer. Roy Berendsohn, Popular Mechanics, 5 Feb. 2014 See More Word History First Known Use 1825, in the meaning defined above
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