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ALL meanings of face-harden

face-hard·en
F f
  • verb with object face-harden to harden the surface of (metal), as by chilling or casehardening. 1
  • verb face-harden to harden the surface of (steel or iron) by the addition of carbon at high temperature 0
  • verb transitive face-harden caseharden (sense 1) 0
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