• 1. variable speed of light: 光速可变理论 | 可变光速理论 | 理论或可变光速理论 | 变光速理论

• 1.In the light of technical rebuilding engineering practice, the constitution of variable-frequency speed-regulation system and the structure features of inverter are described.
  结合技改工程实例，对变频调速系统的构成和变频器的结构特点进行了论述。
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