a cut wave power supply的用法和样例：
- This paper deals with a new type square wave power supply for A.C. arc welding in which very fast switching element IGBT is used for its inverter.
- Blood was trickling out of a cut near his ear.
- Her work is a cut above that of the others.
- She's a cut above the rest (of her colleagues).
- What she said was a cut at (ie was directed at) me.