cutter  
noun [ C ] uk/ˈkʌt.ər/ us/ˈkʌt̬.ɚ/
  (TOOL)      
 刀具,切割器具
a tool or device for cutting something
  Slide the frittata out of the pan and slice it with a pizza cutter.
 a hedge/wire/pastry cutter
 This cutter has a six-inch blade.
 His woodworking shop is full of power tools, blades, bits, and cutters.
 See also: bolt cuttersbox cuttercookie cutterglass cutter
 - More examples
 - She was using an electric hedge cutter.
 - You need pliers and a wire cutter.
 - I put a potato into the machine and pressed down on the arm of the cutter.
 - Roll out the icing and cut a star or tree shape with a cutter.
 - The cardiologist uses a small cutter to remove the abnormal tissue.
 - Firefighters took 40 minutes to saw through the metal frame using a hydraulic cutter.