field rheostat
Electrical Engin.
noun
A variable resistor for controlling the strength of an electromagnet in a motor or dynamo.
Origin
Late 19th century; earliest use found in Proceedings National Electric Light Association 1887.
| 单词 | field rheostat |
| 释义 | field rheostatElectrical Engin. noun A variable resistor for controlling the strength of an electromagnet in a motor or dynamo. Origin |
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