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See Chinese contents: GB/T 38712-2020 GB/T 38712-2020: Test method for thermal conductivity of ultrathin glass -- Heat flow method
This Standard specifies the terms and definitions, test device, environmental conditions, sample requirements, test steps, result calculation and expression, instrument calibration, and test reports for measuring the thermal conductivity of ultrathin glass by the heat flow method. This Standard applies to the test of the thermal conductivity of ultrathin glass.
