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【Daily Topic】【Electrical Edition 20170313】

2017-03-13View Original

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Participation reward: 2 Wealth. Correct reward: 8 Wealth. Multiple-choice question: The bending of the bimetallic strip in a thermal relay is due to the fact that the bimetallic strip ( ). A. Different temperature effects B. Different strengths C. Different expansion coefficients D. Different pressures applied C

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