In some literatures concrete temperature is calculated by converting its heat insulating layer into an air heat exchange coefficient.

有的文献把保温层折算为对空气的热交换系数来计算混凝土的温度。

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This paper introduces the basic concepts of insulating glass unit U values(heat transfer coefficient)and in GB/T22476 standard the basic conditions&mathods for calcuting glass unit U values.

介绍了中空玻璃U值（传热系数）的基本概念和GB/T22476标准对中空玻璃U值的计算和测定所规定的基本条件及方法。

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The utility model is not only heat-resistant, with high insulating strength and low heat conductivity coefficient, but also easy to machine, and can be widely used on electric heating apparatuses.

本实用新 型不但耐热性能好，绝缘强度高、导热系数低，而且便于机械加工，可广泛 用于电热设备上。

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