GB/T 39938-2021室内电取暖地暖性能特征定义、测试方法、尺寸和公式符号标准
英文:Electric room heating—Underfloor heating—Performance characteristics—Definitions, method of testing, sizing and formu...
英文:Electric room heating—Underfloor heating—Performance characteristics—Definitions, method of testing, sizing and formu...