- frequency governor
- variable-frequence governor
- 变频: frequency conversion
- 调速器: governor; speed controller; ...
- 变频调速器(1,563类): frequency control filters
- 交流变频调速器: ac frequency conversion speed regulator
- 变频调速: frequency control of motor eed; frequency control of motor speed; speed control by frequency variation; speed governing by frequency convertion
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