- 凹部: dent; valley; recess
- 校直: align; aline; straighten; al ...
- 凹部: dent; valley; [地质学] recess◇凹部电流 valley current; 凹部电压 valley voltage
- 校直: align; aline; straighten; alignment; straightening◇校直机 straightener; 校直器 swage
- 凹部电流: valley current
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