rip·saw /ˈrɪpˌsɔ/
  粗齒鋸
  Rip·saw  Carp. A handsaw with coarse teeth which have but a slight set, used for cutting wood in the direction of the grain (the fiber); -- called also ripping saw.
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  ripsaw
       n : a handsaw for cutting with the grain of the wood [syn: splitsaw]