a method of performing simple control operations, typically switching street lights on or off, by superposition of a high-frequency switching…
| 单词 | θ77923 |
| 释义 | the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > distribution system > [noun] > switching devices > imposition of switching signal (1) ripple control1938 a method of performing simple control operations, typically switching street lights on or off, by superposition of a high-frequency switching… |
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