...；固/液界面；径向温差；溶质富集[gap=1582]Key words: Al-4%Cu alloy; solid/liquid interface; radial temperature difference; solute accumulation...
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non dimensional radial temperature difference 无量纲径向温差
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The principle and structure for eliminating radial temperature difference stress of large sized lens is discussed in detail. The calculation formulae for related parameters are given.
详细讨论环境温度大范围变化时，大口径光学透镜径向温差应力自动消除的原理及结构，并给出相关参数计算公式。
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