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温度计用弹簧:热双金属带材
2021-10-22
热双金属带材, 热双金属是有两层或两层以上具有不同膨胀系数的合金,牢固结合的符合材料。膨胀系数较大的合金层称为主动层, 膨胀系数较小的合金层成为被动层, 主动层与被动层间可加有起调节电阻作用的中间层。当环境温度变化时,由于主动层和被动层的膨...
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