BS EN ISO 20274:2017规定了制备瓷釉样品的程序，用于测量温度 热长度变化和热膨胀系数的计算。交叉引用:ISO 7991:1987ISO 19496-1:2017购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN ISO 20274:2017 specifies the procedures for the preparation of enamel samples for measurement of the thermal length change and calculation of the thermal expansion coefficient.Cross References:ISO 7991:1987ISO 19496-1:2017All current amendments available at time of purchase are included with the purchase of this document.