a variable resistor for controlling the strength of an electromagnet in a motor or dynamo.
| 单词 | θ77696 |
| 释义 | the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > controlling device or process > [noun] > rheostat > applied to field magnets (1) field rheostat1888 a variable resistor for controlling the strength of an electromagnet in a motor or dynamo. |
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