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1前言直到20世纪50年代中期时,德国干燥砖的工艺还是在空气自然流动状况下的自然干燥场进行(见图1)。从自然干燥到人工热空气干燥经历了一个漫长的
1 Foreword Until the mid-1950s, the German dry brick process was performed in a natural drying place under natural air flow (see Figure 1). From natural drying to artificial hot air drying has been a long one