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The hardness was measured by the microhardness tester.
用显微硬度仪测试了试样的显微硬度。
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Methods: Tension test machine and microhardness tester were used.
方法：用拉力机、显微硬度机测试。
The enamel surface microhardness was measured by a Leitzs microhardness tester.
采用维氏显微硬度仪测定经饮料浸泡后牙釉质表面显微硬度的变化。
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